Download e-book for iPad: Practical Signcryption by Yuliang Zheng (auth.), Alexander W. Dent, Yuliang Zheng

By Yuliang Zheng (auth.), Alexander W. Dent, Yuliang Zheng (eds.)

ISBN-10: 3540894098

ISBN-13: 9783540894094

ISBN-10: 354089411X

ISBN-13: 9783540894117

In today’s international, information has to be despatched around the globe affordably and securely, and that calls for starting place authentication, integrity defense, and confidentiality – the recipient of a message may be in a position to make certain who despatched the message, make certain the message has now not been replaced en course, and make sure the information arrives with no need been learn by means of a person else. the second one editor invented signcryption, a space of cryptography that experiences structures that concurrently offer beginning authentication, integrity safety and confidentiality for facts. Signcryption schemes mix the positive factors of electronic signature schemes with these of public-key encryption schemes and goal to supply defense promises in a manner that's provably right and considerably much less computationally dear than the “encrypt-then-sign” approach most typically followed in public-key cryptography. this can be the 1st complete e-book on signcryption, and brings jointly top authors from the sphere of cryptography in a dialogue of the various tools for construction effective and safe signcryption schemes, and the ways that those schemes can be utilized in functional structures. Chapters take care of the speculation of signcryption, equipment for developing functional signcryption schemes, and some great benefits of utilizing such schemes in functional occasions. The publication might be of profit to cryptography researchers, graduate scholars and practitioners.

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Finally, A outputs the same guess b that A outputs. It is easy to see that A has the same probability of being correct as A has. The following theorem states that when considering the signcryption security corresponding to the operation performed first, the strongest security properties (IND-CCA2 security for EtS and sUF-CMA security for StE) cannot be achieved in the insider security model. 2 Let E be any encryption scheme and S be a probabilistic signature scheme, then the signcryption scheme Π built using the EtS method is not INDCCA2 secure in the insider security model.

A signcryption scheme should provide greater security guarantees and/or greater functionality than a naive combination of public-key encryption and digital signatures. Of course, we would ideally aim to produce a scheme which gave all three advantages; however, in the absence of such a scheme, any one of these advantages may be useful depending on the nature of the application for which signcryption is being used. A discussion of the potential uses of signcryption in practical applications is given in Chap.

An and T. 3 Security of the Sequential Composition Methods In the strong insider security model, where the adversary knows all of the secret keys except for the one being attacked, signcryption security can only be based on the security of the underlying component whose secret key is unknown to the adversary. For example, in the case of confidentiality, the only key that the adversary does not know is the private key of the encryption scheme. In other words, the privacy of the signcryption scheme can only be based on the security of the public-key encryption scheme.

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Practical Signcryption by Yuliang Zheng (auth.), Alexander W. Dent, Yuliang Zheng (eds.)

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