Authenticated Encryption Scheme with Forward Security
Yumin Wang · Journal of Huaihai Institute of Technology · 2007
In most of current authenticated encryption schemes,the recipient can not prove to a third party that message m and signature s are indeed originated from a specific sender.To solve this problem,an authenticated encryption schemes with public verifiability was proposed by Huang and Chang.It was demonstrated that their scheme is subject to known-plaintext attack,and it can not satisfy the need of semantic and forward security.Based on the discrete logarithm problem on cyclic group Zp and the intractability of reversing a one-way Hash function,an improved scheme is proposed which can satisfy all the desired security requirements,by using a provably secure shortened signature scheme(SDSS).Theoretical demonstration shows that the new scheme is secure.