Digital Signature with Message Recovery and Authenticated Encryption (Signcryption) - A Comparison
Mitchell and Yeun  showed that Chen’s scheme  is not a digital signature scheme with message recovery, whereas it should be called an authenticated encryption scheme. Also note that similar remarks have been made in  regarding schemes recently proposed by Zheng. Thus we will show that there are major differences between a digital signature scheme with message recovery and authenticated encryption scheme by proposing a digital signature with message recovery scheme and signcryption scheme as an example for comparison. The security of the schemes is based on intractability of solving the Diffie Hellman problem as well as finding a collision on one-way hash-function.
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