Communication has always been the foundation of human development. Nowadays, the Internet exists in all aspects of people’s lives. Based on a variety of wired and wireless networks on the development of the exchanges are hot. With the development of network, more and more and more people rely on the network to do all kinds
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Generalized signcryption can resolve the problem which identity-based signcryption must turn to other signature or encryption algorithm when only one of confidentiality or authenticity functionalities is required. Identity-based generalized signcryption scheme can be used as a signcryption scheme, as an encryption scheme and as a signature scheme as per requirement. They termed the new primitive
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ID-based cryptosystem simplifies the key management process which is a heavy burden in the traditional certificate-based cryptosystems. It has been, for a few years, the most active area of research and currently is of great interest to the cryptographic society. Evaluating the security is a very important and tricky business in the design of new
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Block ciphers and hash functions are two important branches in symmetric cryptology. Block ciphers play important roles in data encryption. Hash functions are widely used in digital signature schemes, message authentication and integrity checking.In the early 1990s, people realized that DES (Data Encryption Standard) was not suitable for data encryption requirements of the rapidly developing
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Confidentiality and authentication are the targets of information security; they can be realized by encryption-decryption algorithm and signature algorithm. The data transferred in internet needs more security, encryption or signature cannot satisfy the requirement alone. In many conditions, we need confidentiality and authentication at the same time. Although there are some protocol have integrated encryption
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With more and more cryptosystems being applied to insecure environments such asmobile devices, key-exposure seems inevitable. The secret key plays an important role in ancryptosystem, and its exposure will mean that the security is entirely lost. In conventionalpublic key infrastructures, whenever key-exposure happens, certificate revocation list (CRL)can be used to revoke the compromised keys. However,
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With the wide usage of computers and communication network in our lives, more and more people concern the security of information. An authenticated key agreement protocol is used to provide authentication in communication systems, and produces a short-time key that can encrypt the transferred information.The encryption algorithms, Hash functions, MAC algorithms and digital signature schemes
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With the broad implementations of the electronic business and government applications,how to design a secure and feasible cryptosystem becomes more and more significant in theresearch of cryptology. The theory of provable security is a formal analysis technique forwhich the designer defines a precise adversary model in advance, and then proves whether awell-designed cryptosystems can resist
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Key exchange (KE) protocols allow parties to establish a common session key in an un-secured channel, which is used as the key of the symmetric cryptographic algorithm to guar-antee the confidentiality and the integrity of the subsequent communication. Key exchange has been one of the primitives like encryption and signature. Since the Diffie-Hellman pro-tocol is
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