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'''ID-based cryptography''' (or '''identity based cryptography''' or '''identity based encryption''') is a [[key authentication]] system in which the [[public key]] of a user is some unique information about the identity of the user (e.g. email address).
This system works by having a trusted third party who has a secret which can be combined with a user's identity information to produce the user's secret key. The third party also produces some public information which is derived from
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