Anonymity¶
Short definition¶
A defined adversary cannot reasonably distinguish you within the relevant set of users.
Concrete example¶
A phone-free account can still be identifiable by IP or an identity-linked payment.
What it protects¶
Difficulty of attribution against the adversary and scenario actually studied.
What it does not protect¶
Not an absolute app property; not a remedy for seizure or spyware.
Why it matters¶
Asking “anonymous from whom?” avoids a false promise.
Technical details
The anonymity set, adversary capabilities and auxiliary information matter.