Non-interactive and non-malleable commitment scheme based on q-one way group homomorphisms |
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Authors: | Zong-yang Zhang Xiao-lei Dong Zhen-fu Cao |
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Institution: | (1) Computer Science & Engineering Department, Shanghai Jiaotong University, Shanghai, 200240, China |
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Abstract: | Commitment scheme is a basic component of many cryptographic protocols, such as coin-tossing, identification schemes, zero-knowledge and multi-party computation. In order to prevent man-in-middle attacks, non-malleability is taken into account. Many forming works focus on designing non-malleable commitments schemes based on number theory assumptions. In this paper we give a general framework to construct non-interactive and non-malleable commitment scheme with respect to opening based on more general assumptions called q-one way group homomorphisms (q-OWGH). Our scheme is more general since many existing commitment schemes can be deduced from our scheme. |
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Keywords: | commitment scheme non-malleable non-interactive q-one way group homomorphisms (q-OWGH) |
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