Analysis and improvement of authenticatable ring signcryption scheme

Analysis and improvement of authenticatable ring signcryption scheme

We show that the Zhang-Yang-Zhu-Zhang identity-based authenticatable ring signcryption scheme is not secure against chosen plaintext attacks. Furthermore, we propose an improved scheme that remedies the weakness of the Zhang-Yang-Zhu-Zhang scheme. The improved scheme has shorter ciphertext size than...

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Veröffentlicht in:Shanghai jiao tong da xue xue bao 2008-12, Vol.13 (6), p.679-683
Hauptverfasser: Li, Fa-gen, Masaaki, Shirase, Tsuyoshi, Takagi
Format: Artikel
Sprache:eng
Schlagworte:
Architecture
Computer Science
Electrical Engineering
Engineering
Life Sciences
Materials Science
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Zusammenfassung:We show that the Zhang-Yang-Zhu-Zhang identity-based authenticatable ring signcryption scheme is not secure against chosen plaintext attacks. Furthermore, we propose an improved scheme that remedies the weakness of the Zhang-Yang-Zhu-Zhang scheme. The improved scheme has shorter ciphertext size than the Zhang-Yang-Zhu-Zhang scheme. We then prove that the improved scheme satisfies confidentiality, unforgeability, anonymity and authenticatability.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-008-0679-2