Global optimization for quasi-noncyclic relatively nonexpansive mappings with application to analytic complex functions
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Publication Details
Author list: Kumam P., Mongkolkeha C.
Publisher: MDPI
Publication year: 2019
Journal: Mathematics (2227-7390)
Volume number: 7
Issue number: 1
ISSN: 2227-7390
eISSN: 2227-7390
Languages: English-Great Britain (EN-GB)
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Abstract
Secure data transmission is a challenging issue in modern data communication. ID based generalized signcryption is a cost effective security primitive which provides authentication or confidentiality, or jointly confidentiality and authentication. Wei's proposed an ID based generalized signcryption scheme for authentication and confidentiality of big data in a standard model, claiming that their scheme holds the security of indistinguishability against adaptive chosen-ciphertext attacks and existential unforgeability against adaptive chosen message attacks. In this paper, we analyzedWei's scheme by launching security attacks on the scheme to check its validity. As a result, it became clear and proved that the master secret key generated in the scheme is compromisable. Similarly, the mentioned scheme does not hold the security of indistinguishability against adaptive chosen-ciphertext attacks and existential unforgeability against adaptive chosen message attacks. Consequently, Wei's schemes is prone to attacks and is insecure. ฉ 2019 by the authors.
Keywords
Cryptanalysis, Digital signature, Encryption, ID based generalized signcryption, Key Generation Center (KGC), Malicious-but-passive, Security model, Standard model
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