IBE (Identity-Based Encryption)
Craig Gentry, DoCoMo USA Labs
Adi Shamir, co-inventor of the first public key cryptosystem (RSA), introduced the notion of identity-based cryptography (IBC) in 1984 as a way to simplify public key infrastructure (PKI) (Shamir, 1985). (See chapter 57 of this Handbook for a review of public key infrastructure.) His idea, at a high level, is simple and elegant: if public keys did not need to be distributed—if, instead, all public keys in the system were somehow known to all users—then much of the infrastructure needed to support public key cryptography (e.g., ...