Paper 2021/298

On extensions of the one-time-pad

Bhupendra Singh, G. Athithan, and 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.

Note: NIL

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. Minor revision.
Keywords
Latin squareMalleable encryptionOne-time-padPrefect secrecyQuantum- safe
Contact author(s)
bhupendra @ cair drdo in
ga drdochair @ cair drdo in
rpillai @ sag drdo in
History
2021-03-09: received
Short URL
https://ia.cr/2021/298
License
Creative Commons Attribution
CC BY

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},
      note = {\url{https://eprint.iacr.org/2021/298}},
      url = {https://eprint.iacr.org/2021/298}
}
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