Cryptology ePrint Archive: Report 2003/189

Cryptanalysis of publicly verifiable authenticated encryption

Zuhua Shao

Abstract: Ma and Chen proposed a new authenticated encryption scheme with public verifiability. This scheme requires less computational costs and communication overheads than the conventional signature-then-encryption approaches. In this letter, we show that the Ma-Chen scheme does not satisfy three security properties: unforgeability, confidentiality and non-repudiation.

Category / Keywords: public-key cryptography /

Publication Info: cryptanalysis

Date: received 10 Sep 2003

Contact author: zhshao_98 at yahoo com

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Version: 20030912:175244 (All versions of this report)

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