Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Peter Fairbrother <peter@tsto.co.uk>
Newsgroups: sci.crypt
Subject: Re: Seriation
Date: Sun, 8 Dec 2024 23:22:00 +0000
Organization: A noiseless patient Spider
Lines: 14
Message-ID: <vj59mq$2m21$1@dont-email.me>
References: <vj1pgp$5u55$1@paganini.bofh.team> <vj4o37$3uq6p$1@dont-email.me>
 <vj4tf6$g0ta$1@paganini.bofh.team>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Mon, 09 Dec 2024 00:22:02 +0100 (CET)
Injection-Info: dont-email.me; posting-host="cdfb56b7d91ffb89311bb389ce979667";
	logging-data="88129"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX187aOVIH7wv0CVwZd1cKxDNp05+Sn4F1fE="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:FtxINh+lldysPdYXX9Bcb3aSeh0=
Content-Language: en-GB
In-Reply-To: <vj4tf6$g0ta$1@paganini.bofh.team>
Bytes: 1506

On 08/12/2024 19:52, Stefan Claas wrote:
> Peter Fairbrother wrote:

>> 21-letter (usually) seriation was used to make both digraph frequency
>> analysis and transparency analysis harder.
> 
> According to the German WWII documentation 17-letters per two lines,
> a blank line and then again 17-letters per two lines and so on.

There were variations, but the Army and most others used 21 letters. I 
don't know what the blank lines were.

Peter Fairbrother