Certificateless Hybrid Encryption Based on Elliptic Curve Discrete Logarithm
Xin Lai · 2008
Based on elliptic curve discrete logarithm problem and KEM-DEM hybrid encryption construction,a novel certificateless hybrid encryption scheme is proposed.Elliptic Curve Signature Algorithm(ECSA)is used to provide unforgeability of user public key.Owing to KEM-DEM construction user public key is used to generate session key and session key encapsulation.Plaintext is encrypted by symmetry encryption scheme with session key,which provides the confidentiality of plaintext without the strict limitation for plaintext message space.The main operations is point operation in elliptic curve.Compared with previous certificateless encryption schemes related to bilinear pairing operation the scheme is more efficient on computation.