Concepts inAn Efficient Pseudonym Change Protocol Based on Trusted Neighbours for Privacy and Anonymity in VANETs

Anonymity

Anonymity is derived from the Greek word ¿¿¿¿¿¿¿¿, anonymia, meaning "without a name" or "namelessness". In colloquial use, anonymity typically refers to the state of an individual's personal identity, or personally identifiable information, being publicly unknown. There are various situations in which a person might choose to withhold their identity. Acts of charity have been performed anonymously when benefactors do not wish to be acknowledged.  more from Wikipedia

Privacy

Privacy (from Latin: privatus "separated from the rest, deprived of something, esp. office, participation in the government", from privo "to deprive") is the ability of an individual or group to seclude themselves or information about themselves and thereby reveal themselves selectively. The boundaries and content of what is considered private differ among cultures and individuals, but share basic common themes.  more from Wikipedia

Pseudonym

A pseudonym is a name that a person or group assumes for a particular purpose, which differs from his or her original or true name (orthonym). Popular pseudonyms include stage names, noms de plume (pen names), aliases, gamer identifications, anagrams, Graecisms, Latinisations, mystifications, nicknames, and assumed names (and orders) of popes and monarchs.  more from Wikipedia

Communications protocol

A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications. A protocol may have a formal description. Protocols may include signaling, authentication and error detection and correction capabilities. A protocol definition defines the syntax, semantics, and synchronization of communication; the specified behavior is typically independent of how it is to be implemented.  more from Wikipedia

Vehicle

A vehicle is a mobile machine that is designed or used to transport people or cargo. Most often vehicles are manufactured, such as bicycles, cars, motorcycles, trains, ships, boats and aircraft. Vehicles that do not travel on land often are called craft, such as watercraft, sailcraft, aircraft, hovercraft and spacecraft. Land vehicles are classified broadly by what is used to apply steering and drive forces against the ground: wheeled, tracked, railed or skied.  more from Wikipedia