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Types of surveillance
Computer surveillance
Official seal of the Information Awareness Office -- a U.S. agency which developed technologies for mass surveillance
The vast majority of computer surveillance involves the monitoring of data and traffic on the Internet. In the United States for example, under the Communications Assistance For Law Enforcement Act, all phone calls and broadband Internet traffic (emails, web traffic, instant messaging, etc) are required to be available for unimpeded real-time monitoring by Federal law enforcement agencies.
There is far too much data on the Internet for human investigators to manually search through all of it. So automated Internet surveillance computers sift through the vast amount of intercepted Internet traffic and identify and report to human investigators traffic considered interesting by using certain "trigger" words or phrases, visiting certain types of web sites, or communicating via email or chat with suspicious individuals or groups. Billions of dollars per year are spent, by agencies such as the Information Awareness Office, NSA, and the FBI, to develop, purchase, implement, and operate systems such as Carnivore, NarusInsight, and ECHELON to intercept and analyze all of this data, and extract only the information which is useful to law enforcement and intelligence agencies. , mesh display .
Computers are also a surveillance target because of the personal data stored on them. If someone is able to install software (either physically or remotely), such as the FBI's "Magic Lantern" and CIPAV, on a computer system, they can easily gain unauthorized access to this data. , used hard disk .
Another form of computer surveillance, known as TEMPEST, involves reading electromagnetic emanations from computing devices in order to extract data from them at distances of hundreds of meters.
The NSA also runs a database known as "Pinwale", which stores and indexes large numbers of emails of both American citizens and foreigners.
Telephones and mobile telephones
The official and unofficial tapping of telephone lines is widespread. In the United States for instance, the Communications Assistance For Law Enforcement Act (CALEA) requires that all telephone and VoIP communications be available for real-time wiretapping by Federal law enforcement and intelligence agencies. Two major telecommunications companies in the U.S. -- AT&T and Verizon -- have contracts with the FBI, requiring them to keep their phone call records easily searchable and accessible for Federal agencies, in return for $1.8 million dollars per year. Between 2003 and 2005, the FBI sent out more than 140,000 "National Security Letters" ordering phone companies to hand over information about their customers' calling and Internet histories. About half of these letters requested information on U.S. citizens.
Human agents are not required to monitor most calls. Speech-to-text software creates machine-readable text from intercepted audio, which is then processed by automated call-analysis programs, such as those developed by agencies such as the Information Awareness Office, or companies such as Verint, and Narus, which search for certain words or phrases, to decide whether to dedicate a human agent to the call.
Law enforcement and intelligence services in the U.K. and the United States possess technology to remotely activate the microphones in cell phones, by accessing the phone's diagnostic/maintenance features, in order to listen to conversations that take place nearby the person who holds the phone.
Mobile phones are also commonly used to collect location data. The geographical location of a mobile phone (and thus the person carrying it) can be determined easily (whether it is being used or not), using a technique known multilateration to calculate the differences in time for a signal to travel from the cell phone to each of several cell towers near the owner of the phone. A controversy has emerged in the United States over the legality of such techniques, and particularly whether a court warrant is required.
Surveillance cameras
Main article: Closed-circuit television
Citizens under surveillance in Cairns, Queensland
Surveillance cameras are video cameras used for the purpose of observing an area. They are often connected to a recording device, IP network, and/or watched by a security guard/law enforcement officer. Cameras and recording equipment used to be relatively expensive and required human personnel to monitor camera footage. Now with cheaper production techniques, it is simple and inexpensive enough to be used in home security systems, and for everyday surveillance. Analysis of footage is made easier by automated software that organizes digital video footage into a searchable database, and by automated video analysis software (such as VIRAT or HumanID . The amount of footage is drastically reduced by motion sensors which only record when motion is detected.
Surveillance cameras such as these are installed by the millions in many countries, and are nowadays monitored by automated computer programs instead of humans.
The use of surveillance cameras by governments and businesses has dramatically increased over the last 10 years. In the U.K., for example, there are about 4.2 million surveillance cameras1 camera for every 14 people.
In the United States, the Department of Homeland Security gives billions of dollars per year in Homeland Security grants for local, state, and federal agencies to install modern video surveillance equipment. For example, the city of Chicago, IL recently used a $5.1 million Homeland Security grant to install an additional 250 surveillance cameras, and connect them to a centralized monitoring center, along with its preexisting network of over 2000 cameras in a program known as Operation Virtual Shield. Chicago Mayor Richard Daley stated that Chicago will have a surveillance camera on every street corner by the year 2016.
As part of China's Golden Shield Project, several U.S. corporations such as IBM, General Electric, and Honeywell have been working closely with the Chinese government to install millions of surveillance cameras throughout China, along with advanced video analysis and facial recognition software, which will identify and track individuals everywhere they go. They will be connected to a centralized database and monitoring station, which will, upon completion of the project, contain a picture of the face of every person in China: over 1.3 billion people. Lin Jiang Huai, the head of China's "Information Security Technology" office (which is in charge of the project), credits the surveillance systems in the United States and the U.K. as the inspiration for what he is doing with the Golden Shield project.
The Defense Advanced Research Projects Agency (DARPA) is funding a research project called Combat Zones That See that will link up cameras across a city to a centralized monitoring station, identify and track individuals and vehicles as they move through the city, and report "suspicious" activity (such as waving arms, looking side-to-side, standing in a group, etc).
At Super Bowl XXXV in January 2001, police in Tampa Bay, Florida, used Identix facial recognition software, FaceIt, to scan the crowd for potential criminals and terrorists in attendance at the event. (it found 19 people with pending arrest warrants)
Governments often initially claim that cameras are meant to be used for traffic control, but many of them end up using them for general surveillance. For example, Washington, D.C. had 5000 "traffic" cameras installed under this premise, and then after they were all in place, networked them all together and then granted access to the Metropolitan Police Department, so that they could perform "day-to-day monitoring".
The development of centralized networks of CCTV cameras watching public areasinked to computer databases of people's pictures and identity (biometric data), able to track peoples' movements throughout the city, and identify who they have been withas been argued by some to present a risk to civil liberties.
Social Network Analysis
One common form of surveillance is to create maps of social networks based on data from social networking sites such as Facebook, MySpace, Twitter as well as from traffic analysis information from phone call records such as those in the NSA call database, and others. These social network "maps" are then data mined to extract useful information such as personal interests, friendships & affiliations, wants, beliefs, thoughts, and activities.
Many U.S. government agencies such as the Defense Advanced Research Projects Agency (DARPA), the National Security Agency (NSA), and the Department of Homeland Security (DHS) are currently investing heavily in research involving social network analysis. The intelligence community believes that the biggest threat to U.S. power comes from decentralized, leaderless, geographically disbursed groups of terrorists, subversives, and extremists. These types of threats are most easily countered by finding important nodes in the network, and removing them. To do this requires a detailed map of the network.
Jason Ethier of Northeastern University, in his study of modern social network analysis, said the following of the Scalable Social Network Analysis Program developed by the Information Awareness Office:
The purpose of the SSNA algorithms program is to extend techniques of social network analysis to assist with distinguishing potential terrorist cells from legitimate groups of people ... In order to be successful SSNA will require information on the social interactions of the majority of people...