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From: Peter Fairbrother <peter@tsto.co.uk>
Newsgroups: sci.crypt
Subject: Re: Seriation
Date: Sat, 7 Dec 2024 21:40:16 +0000
Organization: A noiseless patient Spider
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Seriation is not a cipher, it is a technique used to build ciphers. Like 
substitution and permutation, of which it is a form of the latter.

It can be useful eg with digram-based ciphers like Playfair, where it 
makes cryptanalysis based on the known frequency of occurrence of 
digrams in the plaintext language much harder or impossible.

Peter Fairbrother



On 07/12/2024 15:27, Stefan Claas wrote:
> $ echo "Hello sci.crypt community. This is a test with seriation." | seriation
> Preprocessed text in lines:
> 
> HELLOSCICRYPTCOMMUNIT
> YTHISISATESTWITHSERIA
> TI
> ON
> 
> Seriation:
> 
> HY ET LH LI OS SI CS IA CT RE YS PT TW CI OT MH MS UE NR II TA
> TO IN
> 
> Seriation was used in the German WWII cipher Doppelkastenschlüssel
> and I thought it is pretty cool. However, I did not managed yet to
> understand how encryption and decryption works.
>