Improved Security Proof for the Camenisch-Lysyanskaya Signature-Based Synchronized Aggregate Signature Scheme. (arXiv:2202.09808v2 [cs.CR] UPDATED)

Web: http://arxiv.org/abs/2202.09808

The Camenisch-Lysyanskaya signature scheme in CRYPTO 2004 is a useful
building block to construct privacy-preserving schemes such as anonymous
credentials, group signatures or ring signatures. However, the security of this
signature scheme relies on the interactive assumption called the LRSW
assumption. Even if the interactive assumptions are proven in the generic group
model or bilinear group model, the concerns about these assumptions arise in a
cryptographic community. This fact caused a barrier to the use of cryptographic
schemes whose security …

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