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Revocable Quantum Digital Signatures. (arXiv:2312.13561v1 [quant-ph])
cs.CR updates on arXiv.org arxiv.org
We study digital signatures with revocation capabilities and show two
results. First, we define and construct digital signatures with revocable
signing keys from the LWE assumption. In this primitive, the signing key is a
quantum state which enables a user to sign many messages and yet, the quantum
key is also revocable, i.e., it can be collapsed into a classical certificate
which can later be verified. Once the key is successfully revoked, we require
that the initial recipient of the …
capabilities digital digital signatures key keys messages quantum results sign signatures signing signing key state study