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Certificate less cryptography achieves the best of the two worlds: it inherits from identity-based techniques a solution to the certificate management problem in public-key encryption, whilst removing the secret key escrow functionality inherent to the identity-based setting. Broadcast signcryption, which enables the broadcaster to simultaneously encrypt and sign the content meant for a specific set...
The session initiation protocol (SIP) is considered as the dominant signaling protocol for calls over the Internet. However, how to authenticate each other and agree on a session key has not been efficiently solved. In 2007, Wang and Zhang proposed a key agreement protocol and a new authentication and key agreement mechanism for SIP. In this paper, we prove that Wang and Zhang's key agreement protocol...
As various applications of SIP-based VoIP networks have been proposed, security has become one of the big research challenges and is receiving increasing attention. In this paper, we present a certificate-based two party authentication key agreement protocol for SIP-based VoIP networks and prove its security in the random oracle model. Additionally, our scheme could be used for multiple CAs environment...
In Eurocrypt 2003, Gentry introduced the notion of certificate-based encryption, which combines traditional pubic key encryption (PKE) with identity-based encryption (IBE) while preserving most of the advantages of each, such as no private key escrow and less PKI infrastructure. In this paper, we propose the security notion of certificate-based signcryption and present a concrete certificate-based...
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