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San Francisco announced earlier this week it was partnering with PayByPhone to enable 30,000 parking meters with NFC support. 

Intel and MasterCard have teamed up to enable future Intel-powered laptops to work with PayPass enabled MasterCard credit cards.

Personal contact and content sharing has become one of the emerging uses for NFC.

Access card maker HID Global announced a trial with Arizona State University in September in which students were provided NFC-enabled phones, enabling them to gain physical access to buildings.

The Museum of London and its sister institution, the Museum of London Docklands launched a project in August that allows visitors to tap their NFC-enabled phone at exhibits and gain more information, buy tickets to future exhibits or check in, follow or “like” the museums on social services.

T-Mobile partnered with Meridian Health and iMPak Health in October on a new SleepTrak sleep monitoring system, a wearable device with an NFC-equipped card.

Many of these things can be done through QR codes, bumping, Bluetooth or other methods, but NFC provides a very simple and often elegant way to get through the process.

We’re still very early in the NFC game and the phones are just now trickling out in the U.S. But there’s going to be a much bigger flow of NFC-equipped phones starting next year. It’ll be these broader applications that might convince users that the technology has merit.

Today, only one in four people are willing to whip out their iPhone or Android to buy goods. What’s to blame? Security concerns top the charts at 64 percent, but an underlying reason is that 46 percent of people just see their phones as devices to call or e-mail people. Perhaps people have not yet adopted the device as a utilitarian device, and instead use it only for its base functions, and perhaps entertainment.

The second half of the NFC conundrum is that there are a lot of hands reaching for the supposed pile of money that NFC payments will enable. Look at Google's announcement of the Wallet product. Or the ISIS partnership between Verizon, T-Mobile and AT&T. Google is partnering with Mastercard, CitiBank, Sprint, FirstData, Verifone, VivoTech (the NFC partner), Hypercom, Ingenico and NXP (another NFC partner). All of these large companies are going to want a slice of the pie. Where does that leave the retailers? You know, the ones that are actually trying to make money with good and services? Sadly, on the outside of the circle. The carriers are the biggest culprits, wanting to take as much as 50% of transaction revenue because it is "going over their pipes." The financial services companies will be happy taking their normal rates in the 1.75% to 3% range as long as there is a promise that more people will pay electronically (read: sans cash). Between retailers, partners and infrastructure, NFC has years to go before it will be viable for all parties involved.

What will happen in this time frame? Think about the so-called "4G" technology WiMax. The technology is already becoming antiquated with LTE and all the major carriers are working on the next version after that. Sprint is keeping a hybrid of WiMax and LTE going forward but overall it is a tech that died before it even matured. NFC may be the same. What if there are massive leaps in quantum teleportation in the next several years? Does NFC become the WiMax of the payment world?

Maturation Of Direct Carrier Billing The "I do not see myself buying a fridge with this" line comes mostly from the direct carrier folks. Direct carrier billing is the perfect area for micro-payments and payments that stem from ease of use. Think of parking. If you could pay for your parking on the street with your phone, would that convenience be worth an extra couple of cents on the dollar to you? The direct to carrier ecosystem has evolved to the point where it actually makes sense for offline and online use. Zong (acquired by eBay for PayPal integration), PaymentOne and Boku are the leaders in this space. PaymentOne has processed $5 billion in mobile payments and lets users pay with their phone numbers, validating transactions via text. Zong allows that capability as well. Payment One's "One Care" features, announced last week at CTIA, makes direct to carrier billing safe and secure. Transparency is important in mobile commerce because consumers do not really trust their phones to handle their money quite yet. The most important aspect of direct to carrier billing now is that the revenue mechanism has been flipped. It used to be that merchants only got some 40% or less of payments while the carriers and partners took the rest. Even with high margin transactions, that is unacceptable. Today, direct to carrier billing provides the merchants with more than 80% of the revenue, sometimes nearly 95%.

The Dongle World: Smartphones As Credit Card Readers Square, VeriSign and Intuit are pushing hard into the dongle department. Jumio is doing the same thing, just without the dongle. There is not much to be said about the dongle world that we have not already touched on at ReadWriteWeb outside of the notion that it is bringing easy credit card readers to the mobile masses.

The dongle competitors are not worried about what is happening in the ecosytem because it does not really touch their core business. For instance, PayPal does not see NFC or dongles infringing on its business in any way, shape or form. As Laura Chambers, PayPal's head of mobile, said in a recent interview, "we are not worried about much in the ways of competition. There is a lot of white space in the industry for horizontal movement."

What Is PayPal Really Doing? In the interview with Chambers, the first question I asked was, "Why does it seem like PayPal has become a "me too" operator in mobile payments?" It is a fair question, even if Chambers balked to acknowledge that PayPal has been in "me too" mode for the last year or so. PayPal has ignored the dongle movement and NFC is not on its radar as a technology it feels it needs to integrate. "What is the difference between a tap versus a swipe?" Chambers asked. "We are working with what works in the current infrastructure ... We have sat down with consumers and merchants to work with them on what they want." PayPal is growing sideways because there is not a ton of room right now to grow vertically. PayPal will get into NFC solutions when the time is appropriate. Its strategy now is to create as much flexibility for consumers as possible through its mobile wallet program. PayPal's stance is data driven - the company can track when and what consumers buy from mobile phones and tablets. Hence, PayPal is focusing on the shopping end of the spectrum, as opposed to a pure payments play. "60% of people buy more and spend more on mobile," Chambers said. "But, we see that people are not really buying different things on mobile ... the No. 1 driver of growth in mobile payments is boredom." That fits in well with what PayPal sees as "couch commerce." They released a study recently saying that mobile shopping is going to boom this holiday season. As such, PayPal is ready to deploy an end-to-end solution for merchants and consumers to reward loyalty and provide deals and offers along with digital receipts. PayPal believes that it has a lot of room to grow in mobile through these types of horizontal movements. We are also seeing this on a non-mobile front with eBay partnering with Facebook and the Open Graph API and the new X.Commerce initiative that consolidates the PayPal, Zong, Magento, RedLaser and Milo technologies. The company is calling it an "open commerce ecosystem."

Future Of Mobile Payments This article is the first in a series of the trends in mobile payments that ReadWriteWeb will be working on in the next several months. There are a lot of questions and the answers are just beginning to emerge. Who are the winners in the space? Are retail shops in danger of "becoming expensive fronts for online shopping," as Chambers said in the interview? Does NFC really have potential to disrupt offline payments or is it just cool technology? These questions and more are what we will be tackling in the months to come.

The real promise of NFC goes beyond convenient payment for coffee, because every swipe of your phone becomes an opportunity to exchange data and trigger an application. You can use NFC to record your payments, and to exchange other information. Discounts, entry tickets and special offers could all be offered using this technology. Y Combinator start-up Tagstand makes NFC-enabled stickers and 'smart posters' to use in ads, trade-stands and other locations. These stickers allow you to tap your mobile phone on anything and do anything from sharing contact information, to sharing music, starting a multiplayer game or providing a discount coupon. MIT Media Lab produced a short 'day in the life' video to illustrate more possibilities, including a carbon footprint app that would use data from your purchases and transport choices.

There are already a few phone handsets that support NFC, but many more will be launched in 2012. The Nexus S is the first mainstream handset that already has NFC built in, but Nokia, Blackberry and Samsung are launching NFC phones soon and the Apple rumour mill suggests that next year's iPhone will have mobile payments. (NFC world has an exhaustive list of handsets).

Ultimately, NFC is another example of a technology that will connect together the 'Internet of Things'. Along with RFID and GPS, it provides another way for us to use our phones as a window into a world of data from connected devices and printed objects, making a seamless link between our data and the increasingly data-driven world around us.

“I thought someone would be able to change the way people shop, but I didn’t think it would be a startup because this will happen quickly and you also need brands that people trust. And PayPal is one of them. It takes the combination of a trusted payment company and the cooperation with great brands that people trust to change how people shop. I thought I would be able to convince all the major retailers all around the world because I have had  relationships with them for 30 years,” Kingsborough said.

Even with the departure of PayPal’s president Scott Thompson, who is now Yahoo’s new CEO, PayPal hasn’t missed a beat and is executing on its vision, Kingsborough said.

Solving consumer and merchants needs Kingsborough came in and honed the in-store payment initiative, which was underway well before Kingborough arrived. He focused on appealing first to consumers and making it simple for them to grasp, before ensuring the merchants could be able to understand the value of the system. Then he went about getting the cooperation of merchants, criss-crossing the country to call upon retailers and payment infrastructure companies to get them on board. Along the way, he helped PayPal pick up necessary components like location-based service WHERE, whose CEO Walt Doyle was personally persuaded to sell by Kingsborough. The plan is now to start rolling out the payment system in the second quarter though the first U.S. trials have already begun with Home Depot.

Kingsborough said he was drawn to PayPal’s approach to payments because it was aimed at solving deep consumer and merchant needs. He said competitors who focus on near field communication and other alternative payment systems are too often preoccupied with the capabilities of their technology, but they’re not addressing the pressing needs of users.

“Competitors think they’ll solve how easy it is to pay at retail, but that’s not a consumer problem. Their problem is how do they become masters of shopping and use their money smartly and organize their efforts to shop online, in-store and on mobile,” said Kingsborough. “We have a holistic approach. We ask the consumers [what they] want to do. They want to save money, save time and feel important in stores.”

NFC: a feature, not a solution That’s partly why he thinks NFC in particular isn’t ready for prime time. He said it’s going to take a while for it to proliferate in stores and on handsets. But more fundamentally, it doesn’t make consumer’s lives better.

“Do I think NFC will work someday? Maybe. But to me, NFC is a feature, not a solution that solves problems. If your strategy is NFC today, you need a new strategy,” Kingsborough.

Google and Isis, the carrier consortium including Verizon, AT&T and T-Mobile, are pushing hard on NFC and are angling to become the go-to mobile wallet for users, who will be able to pay at point-of-sale terminals with a tap of their phone. Many of the pieces for NFC fell into place for the technology in 2011, though there are still many hurdles ahead toward a broad rollout (subscription required) and mass consumer adoption.

PayPal’s approach bypasses many of the hardware constraints of NFC and pushes a two-pronged approach to in-store payments. Users can either use a PayPal Access card connected to their account, or more intriguingly, enter their phone number and PIN at a POS terminal and access their PayPal account. PayPal takes a user’s identification and turns it into a token, which is authenticated in the cloud, so no actual credit card numbers or financial data travels back and forth.

What it takes to win Kingsborough said the companies that win will be comprehensive and ubiquitous, allowing consumers to conduct transactions wherever they want to. By going with a software-based approach, PayPal can address about 8.2 million of the 10 million point of sale terminals with its payment system, without forcing retailers to buy new hardware. Then it’s up to PayPal to convince retailers to jump on board. It’s doing some critical work by signing deals with payment infrastructure companies like AJB Software Designs, which helps connect the point of sale terminals at many tier-one retailers to payment processors and financial institutions. Merchants that use AJB will have an easy path in enabling PayPal payments in store. PayPal is talking to other point of sale companies such as Verifone.

Merchants won’t just be getting a potentially cheaper alternative to credit cards. In PayPal’s vision, they’ll also be getting a way to push out offers to consumers, both in-store and nearby. Kingsborough said PayPal is working through its mobile app to address a variety of needs of merchants, from helping them manage online, mobile and in-store sales to improving loyalty and offering targeted discounts to users. Those additional tools will be rolled out over time in the next year or two. Google has outlined early plans to also provide coupons and offers to consumers using Google Offers in conjunction with Google Wallet.

Providing value But the other important winning determinant will be providing valuable, relevant and easy-to-use services to consumers, becoming the one mobile wallet they turn to, said Kingsborough. He said using tools like WHERE’s targeting and location technology will allow merchants to not just push out deals but deliver very context-aware content. For example, he said a clothes retailers might be able to message a nearby customer, letting them know they’ll earn $5 in their PayPal account that day if they buy jeans that they’ve purchased in the past. And, with the right permissions, the merchant may also be able to know the customer is with two friends and offer a group discount.

“It’s not just the capabilities of location-based services or understanding what a person just did; but it’s about being highly relevant to the person using the services,” Kingsborough said

He said in the battle to become the preferred digital wallet, PayPal will be the simplest for people to use, allowing people to link their credit, debit and loyalty cards, even potentially their drivers license. Just as people stick primarily to one browser, he said consumers will want to rely on primarily one wallet and he believes that PayPal will be that provider.

“Ours to lose” Kingsborough said it’s the whole offering that makes PayPal’s approach a winner. It’s a trusted name with more than 100 million users worldwide and it’s focused on providing value to both consumers and merchants with an easy path to ubiquity. “This is ours to lose,” he said. “I’m very confident about that. Otherwise, I’d be golfing right now in Hawaii.”

San Francisco announced earlier this week it was partnering with PayByPhone to enable 30,000 parking meters with NFC support. People can tap their phone against a parking meter and call up a parking application that identifies the parking location and allows the driver to enter his or her desired parking time and complete the transaction. The actual payment happens inside the app with a stored credit card, but the technology provides a short cut to the transaction.

Intel and MasterCard have teamed up to enable future Intel-powered laptops to work with PayPass enabled MasterCard credit cards. Users will be able to enter in their payment credentials for online purchases by tapping their card on their computer instead of storing the information on their machine or entering it manually.

Personal contact and content sharing has become one of the emerging uses for NFC. RIM in October introduced BlackBerry Tag, which will enable users of NFC phones to exchange contact information, documents, URLs, photos and other multimedia content with a tap of their phones. Google has enabled a similar a solution with Android Beam, which will work on NFC-enabled phones. This can serve as a Bump-like way to pass back and forth information quickly.

Access card maker HID Global announced a trial with Arizona State University in September in which students were provided NFC-enabled phones, enabling them to gain physical access to buildings. All the participants were able to enter residence halls with their phones, and some were also allowed to open individual room doors using unique digital key and PINs.

The Museum of London and its sister institution, the Museum of London Docklands launched a project in August that allows visitors to tap their NFC-enabled phone at exhibits and gain more information, buy tickets to future exhibits or check in, follow or “like” the museums on social services. It’s part of Nokia’s NFC Hub effort to help businesses set up NFC campaigns.

T-Mobile partnered with Meridian Health and iMPak Health in October on a new SleepTrak sleep monitoring system, a wearable device with an NFC-equipped card. Users can upload their sleep data to an NFC-enabled Nokia astound with a tap.

Nokia and NFC Danmark launched NFC-enabled smart poster campaign in Telia stores in Denmark, enabling Nokia N9 users to download mobile apps by tapping on a poster. The two companies also introduced what Danmark called the world’s first NFC-enabled vending machine.

The winning application of the WIMA NFC USA conference in San Francisco earlier this month was a project called Think&Go, which is being tested by French supermarket chain Groupe Casino. Think&Go allows visually impaired and elderly shoppers to call up large text information on products by tapping NFC tags on store shelves.

These are just a sample of the projects and real applications leveraging NFC. As you can see, none of them are actual mobile wallets. The biggest thing they provide is a real short cut to information and actions that can happen without much work. Many of these things can be done through QR codes, bumping, Bluetooth or other methods, but NFC provides a very simple and often elegant way to get through the process.

Also, in some of these cases, what’s also nice is that since they aren’t trying to conduct sensitive transactions, they don’t need to access the secure element inside a phone. That could be a limiting factor in the roll out of NFC, because the owners of the secure element, often the carriers, don’t seem to be in a hurry to enable a lot of other NFC payments systems. But with a host of other non payment uses emerging, users won’t have to wait to find out if their digital wallet is enabled on their particular phone. There might be other ways they can experience the power of NFC first. That will help in just teaching people the practice of tapping for information, transactions and access.

We’re still very early in the NFC game and the phones are just now trickling out in the U.S. But there’s going to be a much bigger flow of NFC-equipped phones starting next year. It’ll be these broader applications that might convince users that the technology has merit.

solitude is a catalyst to innovation. As the influential psychologist Hans Eysenck observed, introversion fosters creativity by “concentrating the mind on the tasks in hand, and preventing the dissipation of energy on social and sexual matters unrelated to work.

Culturally, we’re often so dazzled by charisma that we overlook the quiet part of the creative process

“Without great solitude, no serious work is possible,” Picasso said

Virtually all American workers now spend time on teams and some 70 percent inhabit open-plan offices, in which no one has “a room of one’s own.” During the last decades, the average amount of space allotted to each employee shrank 300 square feet, from 500 square feet in the 1970s to 200 square feet in 2010.

It is known that short term exposure of microwaves exuded from a cell phone, depending on how far the antenna is from the head, can penetrate as much as 1 1/2 inches into the brain, but this study focuses more on the long term effects and how EMF impacts specific brain proteins. This provides new evidence of the potential relationship between EMF and health complications stemming from EMF such as headaches, dizziness, sleep disorders, and even tumors and Alzheimer’s disease.

Another study conducted by a Russian team of researchers also showed that EMF and cell phones cause significant long-term cognitive decline in children. It may be time for parents to re-determine if young children should really be using these devices with growing bodies and developing brains.

A number of foreign countries are attempting to adopt precautionary protocols to limit cell phone use in an attempt to mitigate the number of adverse effects they have on human health. In 2011, the WHO/IARC released a report stating that cell phone radiation may have a carcinogenic effect on humans. In fact, the World Health Organization actually said that cell phones are in the same cancer-causing category as lead, engine exhaust, and chloroform.

The new question is: if your house is on fire what do you grab, your wallet or your phone?

I bet the answer is an overwhelming "phone", since we do almost everything with our mobile devices and very soon we won't be needing a wallet.

Our vision at Seconds is to make it easier for merchants and customers to interact and transact.  This is no more apparent than when looking at our latest innovations on the mobile payment front: Pay by Text.

Okay, here's a great one.... how about anything to do with hospitality?  Already, when you check in to a hotel they ask for your contact information, namely a cell phone number.  By running on the Seconds platform the can now open a quick and easy channel for you to text and pay for room service, any and all products... not to mention your room.  Or what about on a Vegas Casino floor....

Here's how it works: Once a mobile user sets up a Seconds account and attaches a payment card, they now can simply pay for the desired product with a one word text to the merchant's Seconds number, in this case it would be the word "Sandwich".  The resulting text a few seconds later will inform the user they indeed have been successfully charged X amount.  Done.

We are currently one month into a pilot program with a customer testing the functionality and perfecting the process.   Each week we are seeing more and more mobile transactions through Pay by Text, and if things keep going the way they are now this could become the default payment method outside simple food offerings.

Roll with me for a moment.  Imagine going to a movie and rather than waiting in line for the teller to give you a ticket you just simply text "Mission Impossible 4" to the box office and the next thing you know you have paid for the movie and are sent the secret code to enter via text.

Or how about the next time to your favorite band is in town.... do we really have to deal with the whole Ticketmaster ordeal?  Why can't I send a text to the concert organizer with a simple "Said Band Name" and pay for the price of admission.

Important Note: This is not carrier billing, where you place the transaction onto your cell phone bill.  Seconds is completely separate from the carrier and a stand alone mobile payment system.

So, what about NFC? The problem with NFC technology is you actually have to be in physical proximity for the transaction to work.  The whole point of "Near Field Communication" is touching or swiping your device on a reader which will result in a transaction.  But what happens if I want to pay for something when I am not actually at the specific location or can't get within a few inches of the reader?  What if it's ecommerce, which will become more prevalent as time goes on?  Although it might have its place, it looks as if NFC  underwhelms and under-delivers.

That is why we are very excited about our Pay by Text technology, we see a whole new world of payments when you disassociate proximity with transaction.  It's going well right now and the future is looking very bright for Seconds.

The SDiD 1020 RFID based SD Card supports ISO 15693, ISO 14443A standards, Philips I-Code SLI and Texas Instruments Tag-it HF. The SDiD 1020 can be customized for industrial, enterprise and government applications.

Both the SDiD 1010 and 1020 Cards operate in the 13.56 MHz frequency range, over a distance of typically a few centimeters. The SDiD Card supports PDAs and Smartphones with SD Card slots and an SDIO interface based on Microsoft Pocket PC OS 2002, Windows Mobile 2003, and Palm OS 4.1.

Wireless Dynamics Inc. is introducing the SDiD Card, the first RFID (Radio Frequency Identification) Reader/Writer SD (Secure Digital) Card in the industry. Users can now utilise their Personal Digital Assistants (PDA) and Smartphones as portable RFID terminals. Applications include reading and writing RFID tags for the health-care, pharmaceutical, retail logistics, and other industries.

The SIG has been working on combining Bluetooth and UWB since May this year and the specification is set for introduction in the first part of 2007 with prototyping following in the latter part of 2007.

NFC operates over very short distances - a few centimetres or less - and is optimised for secure communication between devices with minimal user configuration.

Motorola plans to begin trials of NFC-enabled phones in the U.S. later this year, the company said. The phones will be used with MasterCard International Inc.'s PayPass payment service, it said. Motorola did not specify where the trials will take place.

NFC-based payment functions have already been announced by several handset vendors, including Panasonic Mobile Communications Co. Ltd., Sharp Corp. and Fujitsu Ltd. They will make products compatible with a payment system developed by Felica Networks Inc., a joint venture between NTT DoCoMo Inc. and Sony Corp.

Nokia Corp. and Samsung Electronics. Co. Ltd. have also announced plans to incorporate NFC-based payment functions in their respective handset lines.

"What we wanted to focus on was removing the mechanics of the transaction and building the relationship between the merchant and customer," said Megan Quinn, director of products at Square, which occupies space at the Chronicle building at Fifth and Mission streets.

But, of course, Square isn't the only company working hard to crack the nut of mobile payments - and they all face considerable challenges.

Google, Visa, MasterCard, VeriFone, eBay's PayPal division and a joint venture among AT&T, Verizon and T-Mobile are attacking the problem in various ways. In most cases, those businesses are going a different direction than Square, employing near field communications (NFC) technology that allows people to tap their phone near a terminal to make a payment.

Done right, mobile payments can accelerate the monetary exchange, while streamlining the issuance, acceptance and storage of receipts, coupons and loyalty cards. Down the road - once consumer and retail use reaches critical mass - the hope is that people will be able to leave their wallets at home altogether.

But there's a chicken and egg paradox: Customers won't start using mobile payments in great numbers until they're accepted in great numbers, and retailers don't have a huge incentive to roll these systems out until customers are clamoring to pay this way.

There are only about 150,000 retailers nationwide that accept payments over MasterCard's NFC-based Paypass readers. Google's Wallet payment app works with this system, and industry rumors suggest the next iPhone might as well.

Square, which has so far focused on small merchants has about 20,000 that accept Card Case.

Another big challenge is human inertia. To get people to download apps, key in credit card numbers and transform a habit they're very comfortable with, mobile payments will have to represent more than a little improvement over what they do today.

"You have to offer them a compelling reason to do it," said David Mangini, an IBM executive focused on mobile payments. "At a very, very minimum ... it has to be just as convenient, just as broadly accepted and just as safe."

One of the big knocks on basic NFC payments is that tapping a phone near a reader doesn't represent a whopping improvement over swiping a card. In addition, merchants have little to gain by replacing one expensive payment infrastructure with another, some observers say.

"It doesn't upset the status quo," said Nick Holland, senior analyst at Yankee Group. "It doesn't really change the original business model and it all goes through the same rails."

Receipts, deals Google argues that its NFC-based Wallet app is a big step forward for a few reasons. A single tap replaces not just the payment, but also the exchange of receipts, coupons and loyalty points.

On top of that, Google believes it's tying together the on- and off-line retail worlds, by allowing consumers to move the deals they spot on the Web into the Wallet app, where they can redeem them in the real world. Google Wallet also advertises nearby deals when users open up the app.

"For the consumer, it's really about tap, pay and save," said Osama Bedier, vice president of payments at Google. "On the merchant side, it's about closing the loop on that advertising."

This is a critical goal for Google, too, as it experiences slowing growth in online advertising - 93 percent of commerce still occurs offline, according to Forrester Research

For its part, Square steers around the limitations of NFC - as well as the various roadblocks of wireless carriers and credit processing networks - by leveraging the powers of the Internet to process payments. The credit card information is stored online, in Square's secure cloud, not on the device itself.

Square, which started by providing small attachments that allow merchants to swipe credit cards using mobile devices, acts as the merchant of record for its customers. This allows the businesses to quickly start accepting credit cards without going through the usual drawn out and expensive process of applying for a merchant account. But it also clearly puts more risk onto Square's shoulders.

Square turned on the hands-free feature on its Card Case app, which takes advantage of the so-called geofencing capabilities in the latest version of Apple's mobile software, in an upgrade to the app in November. The feature is only available on Apple devices to date

Quinn said "automatic tabs" represents an obvious improvement over traditional payments and it's quickly driving user growth (though the company doesn't disclose user numbers).

In addition, retailers have seen revenue leap as much as 20 percent since integrating the app. It drives traffic by highlighting nearby establishments, and the ease of payment encourages customer loyalty, the company says. Tips also tend to go up.

Is it safe? But the question that has dogged Square - and indeed hangs over much of the mobile payment space - is security.

Early last year, VeriFone CEO Douglas Bergeron blasted Square - its attention-grabbing young competitor - for what he called serious security flaws. In an online video, he argued that any bad actor could use the Square dongle and an easy-to-create app to skim credit card numbers.

Square CEO Jack Dorsey, also the co-founder of Twitter, defended the company's security practices in a letter. He also highlighted the inherent insecurity of credit cards, noting that any sketchy waiter is equally free to steal your information.

Meanwhile, Quinn argued that Card Case is actually more secure than credit cards because it only works if you're in the location and your face matches the picture that pops up on the merchant's screen.

The radio technology behind NFC has taken some security lumps, too.

Late last month, a security researcher at a Washington, D.C., conference used a wireless reader she bought on eBay to highlight some weaknesses of radio frequency identification, Forbes reported. She pulled the critical data from an RFID-enabled credit card through a volunteer's clothing, encoded that data onto a blank card and put it to use onstage.

Holland said that any new form of payment inevitably creates new forms of fraud. The challenge will be to educate consumers and merchants about how to minimize the risks.

"Clearly, having a device always with you and connected is a very inviting target for criminals," he said. "Any safe is only as strong as the key."