A one-shot signature is a cryptographic signature scheme specifically designed for a single instance of use. Once a message is signed with a particular key, that key cannot be reused for any subsequent signatures without critically compromising its security. These schemes often provide high security against quantum computer attacks, rendering them pertinent for post-quantum cryptography research. They deliver strong authenticity for a singular transaction or data block.
Context
One-shot signatures represent a topic of increasing importance within the field of post-quantum cryptography, particularly as quantum computing capabilities advance. Their primary limitation involves the necessity for new keys for each signature, posing significant challenges for practical implementation and efficient key management. Research endeavors focus on developing more efficient and user-friendly variants suitable for future secure communication systems.
A new cryptographic primitive, permutable pseudorandom permutations, enables the first standard-model one-shot signatures, securing single-use digital transactions.
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