Abstract:

An Identity-based encryption (IBE) private key issuing protocol based on attestation identity certificate was proposed to resolve the security problem of user private key issued such as user identity authentication in private issuing, the private security transmitting and the private escrow. The proposed scheme verifies a user’s identity by trust authority (TA) issuing attestation identity certificate, uses a simple blinding technique to eliminate the secure channel and multiple authorities approach to avoid the key escrow problem. Moreover, the scheme saves at least 2t operations in comparison to Lee B et al’s protocol.

Key words: identity-based encryption, private key issuing, attestation identity certificate