AnswerBun.com

Digital Signature or MAC Yielding Non-Binary Verification Predicate

Cryptography Asked on December 24, 2021

Is there a digital signature or MAC scheme in which, the verification algorithm returns not ${text{Valid},text{Invalid}}$, but a discrete (finite or infinite) set of result such as ${text{Valid-for-A}, text{Valid-for-B}, text{Valid-for-C}, text{Invalid-for-All}}$?

This is a curiosity question. There is no limit on the nature of the scheme, it can be symmetric or asymmetric, classical, or post-quantum.

EDIT

To explain why could potentially be "Valid-for-{A,B,C}":

  1. In PKC there could be 3 (or any number of) private keys derived from a master private key (possibly using some form of key-escrow), that can be identified and verified by the "master" public key. An application of such scheme could be "bandwidth-efficient group member authentication".

  2. In symmetric-key cryptography, it could be an multi-party broadcast domain authenticated encryption, in which ciphertext verification don’t require computing the tag with each of the peers’ key – the recipiant instead somehow use the shared key to "decrypt" or "derive" the peer’s key. Same application as above.

Add your own answers!

Related Questions

Speed of a 16384-bit RSA key

1  Asked on March 2, 2021 by melab

 

Can I use ChaCha20-Poly1305 as my KDF?

2  Asked on February 23, 2021 by mint-branch-conditioner

         

Vulnerability in the Digital Signature Algorithm. Can I calculate k and x?

0  Asked on February 18, 2021 by confused-andstuck

 

Is Argon2 “sequential memory hard”?

0  Asked on January 22, 2021 by modal-nest

     

Hash Function Properties

0  Asked on January 19, 2021 by antonis-paragas

     

Why is it important that phi(n) is kept a secret, in RSA?

5  Asked on January 15, 2021 by johankj

   

Ask a Question

Get help from others!

© 2022 AnswerBun.com. All rights reserved. Sites we Love: PCI Database, MenuIva, UKBizDB, Menu Kuliner, Sharing RPP, SolveDir