Chameleon signatures simultaneously provide the properties of non-repudiation and non-transferability for the signed message. However, the initial constructions of chameleon signatures suffer from the key exposure problem of chameleon hashing. This ...
We cryptanalyse the new ID-based encryption scheme proposed by Meshram.We find a method to factorize N, where N is the parameter proposed by Meshram.We also give a method to recover the secret master key of Meshram's ID-based encryption scheme.We also ...
Because of the defect of only the single data encryption and the use of famous encryption algorithm, which was not improved in traditional methods of the registration process, a combined encryption algorithm is proposed in this thesis. That is, the ...
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