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The first implementation of identity-based signatures and an email-address based PKI was developed by [[Adi Shamir]] in 1984<ref>Adi Shamir, [http://www.iseca.org/modules/mydownloads/visit.php?cid=56&lid=33 Identity-Based Cryptosystems and Signature Schemes]. ''Advances in Cryptology: Proceedings of CRYPTO 84, Lecture Notes in Computer Science'', 7:47--53, 1984</ref>, which allowed users to verify [[digital signatures]] using only public information such as the user's identifier. Under Shamir's scheme, a trusted third party would deliver the private key to the user after verification of the user's identity, with verification essentially the same as that required for issuing a certificate in a typical [[Public Key Infrastructure | Public Key Infrastructure (PKI)]].
In 2001, Boneh and Franklin devised the first practical implementation of such an Identity-Based Encryption scheme.<ref>{{cite journal |
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