Security Analysis of a Convertible Multiauthenticated Encryption Scheme
2010 ◽
Vol 159
◽
pp. 111-115
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Keyword(s):
Multi-authenticated encryption scheme is message transmission scheme, which sends message in a secure and authentic way, and allows a group of signers to cooperatively produce a valid authenticated ciphertext so that only the specific recipient can recover the message and verify the signature. Recently, Wu et al. proposed a convertible multi-authenticated encryption scheme and claimed that the scheme was secure. In this paper, we show that Wu et. al’s scheme is not secure against rogue-key attacks. To overcome such attack, we give an improved multi-authenticated encryption scheme by including two hash functions. And our improved scheme is the same efficiency as Wu et.al.’s scheme.
2017 ◽
pp. 240-267
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2005 ◽
Vol 162
(3)
◽
pp. 1475-1483
◽
2015 ◽
Vol 26
(02)
◽
pp. 169-194
◽