Space-Efficient Identify-Based Encryption: Spelling out the Approach by Boneh-Gentry-Hamburg

Patrícia Lustosa V. RibeiroRuy J. G. B. de Queiroz

Identity-based encryption (also known as IBE) is a type of public key cryptography in which the public key of a user is some unique information about his identity. The initial motivation to the creation of IBE was to simplify key management in email systems. An open problem was the creation of a space-efficient IBE scheme that was not based in pairings on elliptic curves. Boneh, Gentry and Hamburg proposed such a system in 2007. The objective of this work is to do a critical analysis of how Boneh, Gentry and Hamburg scheme works, filling in some missing details whenever necessary.

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