Digital signature is a fundamental cryptographic primitive. It enables an entity to validate the authenticity and integrity of a digital document. In this talk, I will be discussing Group signature, Nominative Signature and Multi-signature. Group signature scheme enables any group member to produce a signature anonymously on behalf of the group and in case of misbehavior, the signer can be traced out. In a nominative signature scheme, a nominator and a nominee jointly produce a signature such that only the nominee can verify the signature. Multisignature is a powerful cryptographic primitive that helps to reduce the bandwidth taken by N signatures from O(N ) to O(1). It provides a group of signers the ability to sign collaboratively a common message in such a way that the size of the multisignature remains the same as that of a single signature and the verifier gets convinced that the message has been signed by all the signers.
Online (Google Meet)
Various Types of Signatures in Quantum Era