Group items tagged

Geographical access control may be enforced by personnel (e.g., border guard, bouncer, ticket checker)

n alternative of access control in the strict sense (physically controlling access itself) is a system of checking authorized presence, see e.g. Ticket controller (transportation). A variant is exit control, e.g. of a shop (checkout) or a country

access control refers to the practice of restricting entrance to a property, a building, or a room to authorized persons

can be achieved by a human (a guard, bouncer, or receptionist), through mechanical means such as locks and keys, or through technological means such as access control systems like the mantrap.

Physical access control is a matter of who, where, and when

Historically, this was partially accomplished through keys and locks. When a door is locked, only someone with a key can enter through the door, depending on how the lock is configured. Mechanical locks and keys do not allow restriction of the key holder to specific times or dates. Mechanical locks and keys do not provide records of the key used on any specific door, and the keys can be easily copied or transferred to an unauthorized person. When a mechanical key is lost or the key holder is no longer authorized to use the protected area, the locks must be re-keyed.[citation needed] Electronic access control uses computers to solve the limitations of mechanical locks and keys. A wide range of credentials can be used to replace mechanical keys. The electronic access control system grants access based on the credential presented. When access is granted, the door is unlocked for a predetermined time and the transaction is recorded. When access is refused, the door remains locked and the attempted access is recorded. The system will also monitor the door and alarm if the door is forced open or held open too long after being unlocked

Credential

Access control system operation

The above description illustrates a single factor transaction. Credentials can be passed around, thus subverting the access control list. For example, Alice has access rights to the server room, but Bob does not. Alice either gives Bob her credential, or Bob takes it; he now has access to the server room. To prevent this, two-factor authentication can be used. In a two factor transaction, the presented credential and a second factor are needed for access to be granted; another factor can be a PIN, a second credential, operator intervention, or a biometric input

There are three types (factors) of authenticating information:[2] something the user knows, e.g. a password, pass-phrase or PIN something the user has, such as smart card or a key fob something the user is, such as fingerprint, verified by biometric measurement

Passwords are a common means of verifying a user's identity before access is given to information systems. In addition, a fourth factor of authentication is now recognized: someone you know, whereby another person who knows you can provide a human element of authentication in situations where systems have been set up to allow for such scenarios

When a credential is presented to a reader, the reader sends the credential’s information, usually a number, to a control panel, a highly reliable processor. The control panel compares the credential's number to an access control list, grants or denies the presented request, and sends a transaction log to a database. When access is denied based on the access control list, the door remains locked.

A credential is a physical/tangible object, a piece of knowledge, or a facet of a person's physical being, that enables an individual access to a given physical facility or computer-based information system. Typically, credentials can be something a person knows (such as a number or PIN), something they have (such as an access badge), something they are (such as a biometric feature) or some combination of these items. This is known as multi-factor authentication. The typical credential is an access card or key-fob, and newer software can also turn users' smartphones into access devices.

An access control point, which can be a door, turnstile, parking gate, elevator, or other physical barrier, where granting access can be electronically controlled. Typically, the access point is a door. An electronic access control door can contain several elements. At its most basic, there is a stand-alone electric lock. The lock is unlocked by an operator with a switch. To automate this, operator intervention is replaced by a reader. The reader could be a keypad where a code is entered, it could be a card reader, or it could be a biometric reader. Readers do not usually make an access decision, but send a card number to an access control panel that verifies the number against an access list

monitor the door position

Generally only entry is controlled, and exit is uncontrolled. In cases where exit is also controlled, a second reader is used on the opposite side of the door. In cases where exit is not controlled, free exit, a device called a request-to-exit (REX) is used. Request-to-exit devices can be a push-button or a motion detector. When the button is pushed, or the motion detector detects motion at the door, the door alarm is temporarily ignored while the door is opened. Exiting a door without having to electrically unlock the door is called mechanical free egress. This is an important safety feature. In cases where the lock must be electrically unlocked on exit, the request-to-exit device also unlocks the doo

Access control topology

Access control decisions are made by comparing the credential to an access control list. This look-up can be done by a host or server, by an access control panel, or by a reader. The development of access control systems has seen a steady push of the look-up out from a central host to the edge of the system, or the reader. The predominant topology circa 2009 is hub and spoke with a control panel as the hub, and the readers as the spokes. The look-up and control functions are by the control panel. The spokes communicate through a serial connection; usually RS-485. Some manufactures are pushing the decision making to the edge by placing a controller at the door. The controllers are IP enabled, and connect to a host and database using standard networks

Access control readers may be classified by the functions they are able to perform

and forward it to a control panel.

Basic (non-intelligent) readers: simply read

Semi-intelligent readers: have all inputs and outputs necessary to control door hardware (lock, door contact, exit button), but do not make any access decisions. When a user presents a card or enters a PIN, the reader sends information to the main controller, and waits for its response. If the connection to the main controller is interrupted, such readers stop working, or function in a degraded mode. Usually semi-intelligent readers are connected to a control panel via an RS-485 bus.

Intelligent readers: have all inputs and outputs necessary to control door hardware; they also have memory and processing power necessary to make access decisions independently. Like semi-intelligent readers, they are connected to a control panel via an RS-485 bus. The control panel sends configuration updates, and retrieves events from the readers.

Systems with IP readers usually do not have traditional control panels, and readers communicate directly to a PC that acts as a host

a built in webservice to make it user friendly

Some readers may have additional features such as an LCD and function buttons for data collection purposes (i.e. clock-in/clock-out events for attendance reports), camera/speaker/microphone for intercom, and smart card read/write support

cognitive perspective

continuous process integrated in the interaction with the environment

normative perspective

logic of decision making

and rationality

decision making is a reasoning or emotional process which can be rational or irrational, can be based on explicit assumptions or tacit assumptions.

Logical decision making

making informed decisions

recognition primed decision approach

without weighing alternatives

integrated uncertainty into the decision making process

A major part of decision making involves the analysis of a finite set of alternatives described in terms of some evaluative criteria.

multi-criteria decision analysis (MCDA) also known as multi-criteria decision making (MCDM).

differentiate between problem analysis and decision making

Problem analysis must be done first, then the information gathered in that process may be used towards decision making.[4]

decision making techniques people use in everyday life

Pros and Cons

Simple Prioritization:

Decision-Making Stages

Orientation stage

Conflict stage

Emergence stage

Reinforcement stage

Decision-Making Steps

Outline your goal and outcome

Gather data

Brainstorm to develop alternatives

List pros and cons of each alternative

Make the decision

take action

Learn from, and reflect on the decision making

Cognitive and personal biases

Selective search for evidence

Premature termination of search for evidence

Inertia

Selective perception

Wishful thinking or optimism bias

Choice-supportive bias

Recency

Repetition bias

Anchoring and adjustment

Group think – Peer pressure

Source credibility bias

Incremental decision making and escalating commitment

Attribution asymmetry

Role fulfillment

Underestimating uncertainty and the illusion of control

a person's decision making process depends to a significant degree on their cognitive style

thinking and feeling; extroversion and introversion; judgment and perception; and sensing and intuition.

someone who scored near the thinking, extroversion, sensing, and judgment

would tend to have a logical, analytical, objective, critical, and empirical decision making style.

national or cross-cultural differences

distinctive national style of decision making

human decision-making is limited by available information, available time, and the information-processing ability of the mind.

two cognitive styles: maximizers

satisficers

nodes in a value network represent people

nodes are connected by interactions that represent tangible and intangible deliverables

Value networks exhibit interdependence

Companies have both internal and external value networks.[1]

customers or recipients, intermediaries, stakeholders, complementary, open innovation networks and suppliers

key activities

processes and relationships that cut across internal boundaries

Value is created through exchange and the relationships between roles

F&S's value networks consists of these components

customers

Some service the customers all use, and enables interaction between the customers

service

contracts that enables access to the service

the network formed by phone users

example

example

car insurance company

how a company understands itself

value creation process

value creating system

all stakeholders co-produce value

systematic social innovation

strategy as

the Value Network to emerge as a mental model

Verna Allee defines value networks [5] as any web of relationships that generates both tangible and intangible value through complex dynamic exchanges between two or more individuals, groups or organizations. Any organization or group of organizations engaged in both tangible and intangible exchanges can be viewed as a value network, whether private industry, government or public sector.

Allee developed Value network analysis, a whole systems mapping and analysis approach to understanding tangible and intangible value creation among participants in an enterprise system

participants, transactions and tangible and intangible deliverables that together form a value network.

knowledge

benefits

favors

know-how

policy

planning

process

biological organisms, including humans, function in a self-organizing mode internally and externally

no central “boss” to control this dynamic activity

The purpose of value networks is to create the most benefit for the people involved in the network (5)

This is in contrast to key scheduling; key scheduling typically refers to the internal handling of key material within the operation of a cipher.

it involves system policy, user training, organizational and departmental interactions, and coordination between all of these elements.

Public Key Infrastructure (PKI)

A public key infrastructure is a type of key management system that uses hierarchical digital certificates to provide authentication, and public keys to provide encryption. PKIs are used in World Wide Web traffic, commonly in the form of SSL and TLS.

provide greater user value

For numerous reasons the services provided by the commercial companies do not adequately meet the creative, social, political, and financial needs of the 99%

allows self-selected individuals to coalesce into powerful workgroups, forums, and movements.

With the PeerPoint approach, each user will own her own inexpensive internet appliance and all the data and content she creates

If a FreedomBox were used as a starting platform, the PeerPoint application package would be added on top of the FreedomBox security stack.

The common requirements for each PeerPoint app are: world class, best-of-breed open source p2p architecture consistent, granular, user-customizable security management and identity protection integrated with other apps in the suite via a common distributed database and/or “data bus” architecture. consistent, user-customizable large, medium, and small-screen (mobile device) user interfaces ability to interface with its corresponding major-market-share service (Facebook, Twitter, etc.) GPS enabled

First tier applications: distributed database social networking  (comparison of distributed social network applications) trust/reputation metrics crowdsourcing: content collaboration & management  (wiki, Google Docs, or better) project management/workflow data visualization (data sets, projects, networks, etc.) user-customizable complementary currency and barter exchange (Community Forge or better) crowd funding (http://www.quora.com/Is-there-an-open-source-crowdfunding-platform) voting (LiquidFeedback or better) universal search across all PeerPoint data/content and world wide web content