2018 | OriginalPaper | Buchkapitel
Asymmetric Subversion Attacks on Signature Schemes
verfasst von : Chi Liu, Rongmao Chen, Yi Wang, Yongjun Wang
Erschienen in: Information Security and Privacy
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Abstract
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We provide a formal definition of asymmetric subversion model for signature schemes. Our asymmetric model improves the existing symmetric subversion model proposed by Ateniese, Magri and Venturi [CCS’15] in the sense that the undetectability is strengthened and the signing key recoverability is defined as a strong subversion attack goal.
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We introduce a special type of signature schemes that are splittable and show how to universally mount the subversion attack against such signature schemes in the asymmetric subversion model. Compared with the symmetric attacks introduced by Ateniese, Magri and Venturi [CCS’15], our proposed attack enables much more efficient key recovery that is independent of the signing key size.