Paper 2024/1687
Revocable Encryption, Programs, and More: The Case of Multi-Copy Security
Abstract
Fundamental principles of quantum mechanics have inspired many new research directions, particularly in quantum cryptography. One such principle is quantum no-cloning which has led to the emerging field of revocable cryptography. Roughly speaking, in a revocable cryptographic primitive, a cryptographic object (such as a ciphertext or program) is represented as a quantum state in such a way that surrendering it effectively translates into losing the capability to use this cryptographic object. All of the revocable cryptographic systems studied so far have a major drawback: the recipient only receives one copy of the quantum state. Worse yet, the schemes become completely insecure if the recipient receives many identical copies of the same quantum state---a property that is clearly much more desirable in practice. While multi-copy security has been extensively studied for a number of other quantum cryptographic primitives, it has so far received only little treatment in context of unclonable primitives. Our work, for the first time, shows the feasibility of revocable primitives, such as revocable encryption and revocable programs, which satisfy multi-copy security in oracle models. This suggest that the stronger notion of multi-copy security is within reach in unclonable cryptography more generally, and therefore could lead to a new research direction in the field.
Note: 42 pages.
Metadata
- Available format(s)
-
PDF
- Category
- Foundations
- Publication info
- Preprint.
- Keywords
- quantum cryptographyrevocable cryptographypseudorandomness
- Contact author(s)
-
prabhanjan @ cs ucsb edu
sm5540 @ columbia edu
poremba @ mit edu - History
- 2024-10-18: approved
- 2024-10-17: received
- See all versions
- Short URL
- https://ia.cr/2024/1687
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2024/1687,
author = {Prabhanjan Ananth and Saachi Mutreja and Alexander Poremba},
title = {Revocable Encryption, Programs, and More: The Case of Multi-Copy Security},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/1687},
year = {2024},
url = {https://eprint.iacr.org/2024/1687}
}