Anonymity

A pseudonym (; ) or alias () is a fictitious name that a person assumes for a particular purpose, which differs from their original or true name (orthonym). This also differs from a new name that entirely or legally replaces an individual's own. Many pseudonym holders use them because they wish to remain anonymous and maintain privacy, though this may be difficult to achieve as a result of legal issues.

thumb|Protesters outside a Scientology center on February 10, 2008, donning masks, scarves, hoods, and sunglasses to obscure their faces, and gloves and long sleeves to protect them from leaving [[fingerprints.]]

any piece of information about a person that is not publicly known, or that allows identification of that person

tactic used by left-wing protesters who wear black clothing and masks; used to conceal wearers' identities from the police and politically opposing organizationg, protect from the pepper spray and making group look like large unified mass

system for holding debates and discussion panels on controversial issues

Method of anonymous political expression employed in Rome

anonymous web surfing tool that attempts to make activity on the Internet untraceable

lack of restraint when communicating online in comparison to communicating in-person

use of information sanitization to redact identifiable information

The X-Forwarded-For (XFF) HTTP header field is a common method for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer.

thumb|250px|Screenshot of PostSecret with an example postcard. PostSecret is an ongoing community mail art project, created by Frank Warren in 2004, in which people mail their secrets anonymously on a homemade postcard. Selected secrets are then posted on the PostSecret website, or used for PostSecret's books or museum exhibits.

entry on a bulletin board system, Internet forum, or other discussion forums, without a screen name

FindFace is a face recognition technology developed by the Russian company NtechLab that specializes in neural network tools. The company provides a line of services for the state and various business sectors based on FindFace algorithm. Previously, the technology was used as a web service that helped to find people on the VK social network using their photos.

CyberBerkut (, ) is a modern organized group of pro-Russian hacktivists. The group became locally known for a series of publicity stunts and distributed denial-of-service (DDoS) attacks on Ukrainian government, and western or Ukrainian corporate websites. By 2018, this group was accused by western intelligence agencies, such as National Cyber Security Centre (United Kingdom) of being linked to the GRU, providing plausible deniability.