On extensions of the one-time-pad

Bhupendra Singh; G.  Athithan; Rajesh Pillai

Paper 2021/298 Original: eprint.iacr.org/2021/298 ↗

On extensions of the one-time-pad

Bhupendra Singh

G. Athithan

Rajesh Pillai

Abstract

The one-time-pad (OTP) is a classical yet the strongest cipher. Although the OTP offers perfect secrecy and is quantum-safe, it has cryptographic as well as operational weaknesses. Cryptographically its encryption is malleable. Operationally a key used more than once by mistake can lead to successful breaking of the OTP. Hence, there is a need for extensions of OTP to address these two weaknesses simultaneously keeping all the strength of OTP intact. To address this need, we propose two extensions of OTP. In the process we also prove a relation between block ciphers and Latin rectangles.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint.
History: 2021-03-09: last updated; 2021-03-09: published
Short URL: https://ia.cr/2021/298
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2021/298,
      author = {Bhupendra Singh and G.  Athithan and Rajesh Pillai},
      title = {On extensions of the one-time-pad},
      howpublished = {Cryptology {ePrint} Archive, Paper 2021/298},
      year = {2021},
      url = {https://eprint.iacr.org/2021/298}
}