|“||ensures that a user may make multiple uses of resources or services without others being able to link these uses together. . . . Unlinkability requires that users and/or subjects are unable to determine whether the same user caused certain specific operations in the system.||”|
"Within a particular set of information, the inability of an observer or attacker to distinguish whether two items of interest are related or not (with a high enough degree of probability to be useful to the observer or attacker)."