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The Intercept published an expose on the NSA's XKeyscore program. Along with information on the breadth and scale of the NSA's metadata collection, The Intercept revealed how the NSA relies on unencrypted cookie data to identify users. As The Intercept says: "The NSA’s ability to piggyback off of private companies’ tracking of their own users is a vital instrument that allows the agency to trace the data it collects to individual users. It makes no difference if visitors switch to public Wi-Fi networks or connect to VPNs to change their IP addresses: the tracking cookie will follow them around as long as they are using the same web browser and fail to clear their cookies." The NSA slides released by The Intercept give detailed guides to understanding the data transmitted by these cookies, as well as how to find unique machine identifiers that analysts can use to differentiate between multiple machines using the same IP address. We've written before about how spy agencies piggyback on social media account data to find Internet users' names or other identifying info, and these slides drive home the point that HTTP cookies leave users vulnerable to government surveillance, since any intermediary (or spy agency) can read the sensitive data they contain.

Worse yet, most of the time these identifying cookies come from third-party sources on webpages, and users have no meaningful way to opt out of receiving them (short of blocking all third party cookies) since advertisers (the main server of these types of cookies) refuse to honor the Do Not Track header.  Browser makers could help address this sort of non-consensual tracking by both advertisers and the NSA with some simple technical changes—changes that have been shown to reduce the number of third party cookies received by 67%. So far, though, they've been unwilling to build privacy protecting features in by default. Until they do, the best way for users to protect themselves is by installing a privacy protecting app like Privacy Badger, which is designed to block these types of uniquely identifying tracking cookies, or HTTPS Everywhere to block the transmission of HTTP cookies.

The information security world is focused on two new security vulnerabilities, “Spectre” and “Meltdown”, that represent vulnerabilities embedded in computer hardware. Lawfare readers should respond in two ways: keep their operating systems up to date and, critically, install an ad-blocker for your web browser. (Here are guides on how to do so in Chrome and Firefox.) In fact, a proper response to Spectre should involve ad-blocking on all government computers. Other than that, don’t worry. Readers who just wanted to know what to do can stop reading. But for those curious about some of the technical background on these vulnerabilities and why ad-blocking is an essential security measure for a modern computer, read on.

In early 2012, members of the hacking collective Anonymous carried out a series of cyber attacks on government and corporate websites in Brazil. They did so under the direction of a hacker who, unbeknownst to them, was wearing another hat: helping the Federal Bureau of Investigation carry out one of its biggest cybercrime investigations to date. A year after leaked files exposed the National Security Agency's efforts to spy on citizens and companies in Brazil, previously unpublished chat logs obtained by Motherboard reveal that while under the FBI's supervision, Hector Xavier Monsegur, widely known by his online persona, "Sabu," facilitated attacks that affected Brazilian websites. The operation raises questions about how the FBI uses global internet vulnerabilities during cybercrime investigations, how it works with informants, and how it shares information with other police and intelligence agencies. 

After his arrest in mid-2011, Monsegur continued to organize cyber attacks while working for the FBI. According to documents and interviews, Monsegur passed targets and exploits to hackers to disrupt government and corporate servers in Brazil and several other countries. Details about his work as a federal informant have been kept mostly secret, aired only in closed-door hearings and in redacted documents that include chat logs between Monsegur and other hackers. The chat logs remain under seal due to a protective order upheld in court, but in April, they and other court documents were obtained by journalists at Motherboard and the Daily Dot. 

WikiLeaks has published what it says is another batch of secret hacking manuals belonging to the US Central Intelligence Agency as part of its Vault7 series of leaks. The site is billing Vault7 as the largest publication of intelligence documents ever. Friday's installment includes 27 documents related to "Grasshopper," the codename for a set of software tools used to build customized malware for Windows-based computers. The Grasshopper framework provides building blocks that can be combined in unique ways to suit the requirements of a given surveillance or intelligence operation. The documents are likely to be of interest to potential CIA targets looking for signatures and other signs indicating their Windows systems were hacked. The leak will also prove useful to competing malware developers who want to learn new techniques and best practices. "Grasshopper is a software tool used to build custom installers for target computers running Microsoft Windows operating system," one user guide explained. "An operator uses the Grasshopper builder to construct a custom installation executable."

Laugh all you want, fuzzball, but Google is changing how YouTube uploaders manage comments on their videos. The new system, which began rolling out to a limited number of uploaders on Tuesday, favors relevancy over recency and introduces enhanced moderation tools. The new commenting system, which is powered by Google+ and was developed in collaboration between the YouTube and Google+ teams, provides several new tools for moderation, said Nundu Janakiram, product manager at YouTube. It will default to showing YouTube viewers the most relevant comments first, such as those by the video uploader or channel owner. "Currently, you see comments from the last random person to stop by," Janakiram said. "The new system tries to surface the most meaningful conversation to you. We're trying to shift from comments to meaningful conversations," he said.

He explained that three main factors determine which comments are more relevant: community engagement by the commenter, up-votes for a particular comment, and commenter reputation. If you've been flagged for spam or abuse, don't be surprised to find your comments buried, but that also means that celebrities who have strong Google+ reputations will be boosted above others. There's more to the system than just relevancy, though. Because the system is powered by Google+, comments made on posts with YouTube links in the social network will show up on YouTube itself. So, you'll see comments from people in your Google+ Circles higher up, too. Just because it's powered by Google+ doesn't mean that you'll lose your YouTube identity, though. "You are still allowed to use pseudonyms," said Janakiram, whether you're "a Syrian dissident or SoulPancake". Another feature, and one that speaks directly to YouTube's goal of fostering conversations, is that you'll be able to comment publicly or privately to people in your Circles. Replies will be threaded like Gmail. The hope is that new moderation tools will make it easier for video owners to guide the conversation, Janakiram explained. "There have been challenges in the past with certain comments and what's been shown there."