Access token

Access token
In computer systems, an access token contains the security credentials for a login session and identifies the user, the users groups, the users privileges, and, in some cases, a particular application
Contents
1 Overview
2 Types of tokens
3 Contents of a token
4 References
Overview
An access token is an object encapsulating the security identity of a process or thread1 A token is used to make security decisions and to store tamper-proof information about some system entity While a token is generally used to represent only security information, it is capable of holding additional free-form data that can be attached while the token is being created Tokens can be duplicated without special privilege, for example to create a new token with lower levels of access rights to restrict the access of a launched application An access token is used by Windows when a process or thread tries to interact with objects that have security descriptors securable objects1 An access token is represented by the system object of type Token
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