Key-Insulated Undetachable Digital Signature Scheme and Solution for Secure Mobile Agents in Electronic Commerce
TL;DR: The idea of a key-insulated undetachable digital signature is introduced, enabling mobile agents to generate undetachabledigital signatures on remote hosts with the key- insulated property of the original signer’s signing key.
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Abstract: Considering the security of both the customers’ hosts and the eShops’ servers, we introduce the idea of a key-insulated undetachable digital signature, enabling mobile agents to generate undetachable digital signatures on remote hosts with the key-insulated property of the original signer’s signing key. From the theoretical perspective, we provide the formal definition and security notion of a key-insulated undetachable digital signature. From the practical perspective, we propose a concrete scheme to secure mobile agents in electronic commerce. The scheme is mainly focused on protecting the signing key from leakage and preventing the misuse of the signature algorithm on malicious servers. Agents do not carry the signing key when they generate digital signatures on behalf of the original signer, so the key is protected on remote servers. Furthermore, if a hacker gains the signing key of the original signer, the hacker is still unable to forge a signature for any time period other than the key being accessed. In addition, the encrypted function is combined with the original signer’s requirement to prevent the misuse of signing algorithm. The scheme is constructed on gap Diffie–Hellman groups with provable security, and the performance testing indicates that the scheme is efficient.
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Citations
Enhancement of e-commerce security through asymmetric key algorithm
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Key-Insulated Public-Key Cryptosystems.
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Using Transposition Padding to Get CCA2 Security From Any Deterministic Encryption Schemes
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References
Short Signatures from the Weil Pairing
Dan Boneh,Ben Lynn,Hovav Shacham +2 more
- 09 Dec 2001
TL;DR: A short signature scheme based on the Computational Diffie-Hellman assumption on certain elliptic and hyperelliptic curves is introduced, designed for systems where signatures are typed in by a human or signatures are sent over a low-bandwidth channel.
Security Arguments for Digital Signatures and Blind Signatures
David Pointcheval,Jacques Stern +1 more
TL;DR: It is proved that a very slight variation of the well-known El Gamal signature scheme resists existential forgeries even against an adaptively chosen-message attack and an appropriate notion of security related to the setting of electronic cash is defined.
Short Signatures from the Weil Pairing
Dan Boneh,Ben Lynn,Hovav Shacham +2 more
TL;DR: A short signature scheme based on the Computational Diffie–Hellman assumption on certain elliptic and hyperelliptic curves is introduced for systems where signatures are typed in by a human or are sent over a low-bandwidth channel.
Security proofs for signature schemes
David Pointcheval,Jacques Stern +1 more
- 12 May 1996
TL;DR: This paper establishes the generality of this technique against adaptively chosen message attacks and achieves such a security proof for a slight variant of the El Garrial signature schemc where committed values are hashed together with the message.
An Identity-Based Signature from Gap Diffie-Hellman Groups
Jae Choon Cha,Jung Hee Cheon +1 more
- 06 Jan 2003
TL;DR: In this paper, an identity-based signature scheme using gap Diffie-Hellman (GDH) groups was proposed and proved secure against existential forgery on adaptively chosen message and ID attack under the random oracle model.