Paper 2026/779 Original: eprint.iacr.org/2026/779 ↗
And TLS lived happily ever after
Abstract
The plausible threat of a Cryptographically Relevant Quantum Computer (CRQC) has rightly stimulated a move away from traditional methods of asymmetric cryptography to new post-quantum secure equivalents. Digital signature is the cryptographic primitive that authenticates an internet server’s identity by signing each certificate in an X.509 certificate chain. A suggested response to the CRQC threat is to deploy a hybrid classical/post-quantum digital signature, combining a traditional tried-and-tested scheme with a post-quantum alternative, where certificates are signed using both methods. Here we propose a fused signature scheme that adopts the same approach, but introduces minimal friction into existing TLS architectures
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2026-04-20: last updated
- 2026-04-20: published
- Short URL
- https://ia.cr/2026/779
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2026/779,
author = {Michael Scott and Gora Adj and Francisco Rodríguez-Henríquez},
title = {And TLS lived happily ever after},
howpublished = {Cryptology {ePrint} Archive, Paper 2026/779},
year = {2026},
url = {https://eprint.iacr.org/2026/779}
}