Cryptology ePrint Archive: Report 2021/298
On extensions of the one-time-pad
Bhupendra Singh and 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.
Category / Keywords: secret-key cryptography / Latin square, Malleable encryption, One-time-pad, Prefect secrecy, Quantum- safe
Date: received 6 Mar 2021
Contact author: bhupendra at cair drdo in,ga drdochair@cair drdo in,rpillai@sag drdo in
Available format(s): PDF | BibTeX Citation
Note: NIL
Version: 20210309:134543 (All versions of this report)
Short URL: ia.cr/2021/298
[ Cryptology ePrint archive ]