Paper 2025/026 Original: eprint.iacr.org/2025/026 ↗
How to use your brain for cryptography without trustworthy machines
Abstract
In this work, we study cryptosystems that can be executed securely without fully trusting all machines, but only trusting the user's brain. This paper focuses on signature scheme. We first introduce a new concept called ``server-aided in-brain signature,'' which is a cryptographic protocol between a human brain and multiple servers to sign a message securely even if the user's device and servers are not completely trusted. Second, we propose a concrete scheme that is secure against mobile hackers in servers and malware infecting user's devices.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2025-01-08: last updated
- 2025-01-08: published
- Short URL
- https://ia.cr/2025/026
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2025/026,
author = {Wakaha Ogata and Toi Tomita and Kenta Takahashi and Masakatsu Nishigaki},
title = {How to use your brain for cryptography without trustworthy machines},
howpublished = {Cryptology {ePrint} Archive, Paper 2025/026},
year = {2025},
url = {https://eprint.iacr.org/2025/026}
}