On the Security of Some Recently Proposed Certificateless Signcryption Schemes | IEEE Conference Publication | IEEE Xplore

On the Security of Some Recently Proposed Certificateless Signcryption Schemes


Abstract:

A certificateless signcryption (CL-SC) scheme is an important cryptographic primitive which provides the goals of a signature scheme (i.e. the unforgeability) and an encr...Show More

Abstract:

A certificateless signcryption (CL-SC) scheme is an important cryptographic primitive which provides the goals of a signature scheme (i.e. the unforgeability) and an encryption scheme (i.e. the confidentiality) both at once, in a certificateless setting. The certificateless public key cryptography (CL-PKC) setting, makes it possible to overcome the problems of the conventional public key infrastructure (i.e. the certificates management) and the ID-Based public key cryptography (i.e. the key escrow problem), concurrently. Recently, Caixue [4], Shan [16] and Ullah et al. [17] have proposed CL-SC schemes. In this paper, these schemes are analyzed. Some attacks are designed which show that Caixue's scheme is easily forgeable and Shan's scheme is forgeable against a malicious key generation center (KGC). Moreover, it is shown that Ullah et al.'s scheme has basic errors in its algorithms, as it does not even satisfy the correctness of the verification algorithm and it is not a CL-SC scheme at all.
Date of Conference: 09-10 September 2020
Date Added to IEEE Xplore: 23 November 2020
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Conference Location: Tehran, Iran

References

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