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Computer Knowledge and Technology

Proxy signcryption Model Based on the Relations of Proxy and Verifiers in Internet

Yao Bao-yan

Published Jan 1, 2009• 0 citations
OpenAlex

Abstract

The proxy signcryption scheme with proxy signature, key agreement protocol, signcryption scheme and the relationship of proxy and verifiers has perfect forward secrecy, at the same time it can low the cost. There are only two kinds of proxy and verifiers in Internet: point-to-point proxy signcryption scheme with perfect forward secrecy;point-to-multipoint proxy signcryption scheme with perfect forward secrecy.It will introduce the two models respectively in this paper.

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The proxy signcryption scheme with proxy signature, key agreement protocol, signcryption scheme and the relationship of proxy and verifiers has perfect forward secrecy, at the same time it can low the cost. There are only two kinds of proxy and verifiers in Internet: point-to-point proxy signcryption scheme with perfect forward secrecy;point-to-multipoint proxy signcryption scheme with perfect forward secrecy.It will introduce the two models respectively in this paper.
Position-based cryptography has attracted lots of researchers' attentions. In mobile Internet, there are lots of position based security applications. For the first time, one new conception, position-based proxy signcryption is proposed. Based on a secure positioning protocol, one model of position-based proxy signcryption is proposed. In the model, positioning protocol is tightly bound to proxy signcryption, not loosely. Further, we propose one concrete position-based proxy signcryption scheme, its correctness is proved, and its security is also analyzed. As far as we know, it is the first position-based proxy signcryption scheme.
Most existing forward secure proxy signature schemes are constructed based on traditional number theory problems,such as large integer decomposition,discrete logarithm and bilinear pairs,and they are easy to be cracked in a quantum computing environment.In order to deal with the threat of quantum computing environment and reduce the risk of secret key leakage in proxy signature,an identity-based forward secure proxy signature scheme with NTRU lattice is constructed.Introduce forward secure features into the proxy signature over the lattice.Under the random prediction model,the security of the program is converted to the intractability of SIS,and a detailed efficiency analysis is also given.Analysis results show that the scheme realizes forward secrecy and strong non-repudiation,and it is verifiable and strongly identifiable.The computing efficiency is also improved as a result of the shortened signature key of the proxy signer,and shortened signature and signature key of the original signer.
Position-based cryptography has attracted lots of researchers' attention. In the mobile Internet, there are many position-based security applications. For the first time, one new conception-proxy multi-signature binding positioning protocols, is proposed. Based on one secure positioning protocol, one model of the proxy multi-signature binding positioning protocols is proposed. In the model, positioning protocols are bound to proxy multi-signature tightly, not loosely. Further, we propose one scheme of proxy multi-signature binding positioning protocols. As far as we know, it is the first scheme of proxy multi-signature binding positioning protocols.
Secure and efficient message delivery is one of the major aims of computer and communication security research. Based on the key agreement protocols using signcryption proposed by Zheng and Zhang chuan-rong, this paper proposed a forward secure key agreement protocol based on identity-signcyption. It combined the advantages of the identity-based public key system and signcryption technique. As compared to the existing schemes, the protocol is not only confidential, authenticated, but also forward secure.
Perfect concurrent signature was introduced as an efficient approach to solving the problem of fair exchange of signatures. Almost all fair exchange e-commerce protocols that have been proposed until now either do not provide message privacy protection or adopt the sign-then-encrypt scheme to provide confidentiality. However, confidentiality is an important requirement of e-commerce protocols. This paper proposed a new concept called perfect concurrent signcryption which combined the concepts of perfect concurrent signature and signcryption together to resolve the confidentiality problem in e-commerce systems. It also proposed a certificateless perfect concurrent signcryption scheme and proved its security in the random oracle model. The scheme published the two ambiguous signcryptions in any order. Compared with the sign-then-encrypt scheme, this scheme enjoys shorter message length and less operation cost, which makes the scheme has wide application prospects.