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Re: one time pads, not Python

Date 2026-01-02 05:14 -0500
Subject Re: one time pads, not Python
Newsgroups comp.os.linux.misc, alt.folklore.computers
References <CtydnVqzjrtfd5P0nZ2dnZfqn_adnZ2d@giganews.com> <10j0c6d$1nm5b$9@dont-email.me> <wwvms2z98ll.fsf@LkoBDZeT.terraraq.uk> <BmGdnaApAKq2ocn0nZ2dnZfqn_sAAAAA@giganews.com> <10j7j49$2cnu$1@gal.iecc.com>
From c186282 <c186282@nnada.net>
Organization wokiesux
Message-ID <TMWdnfxhPv4HB8r0nZ2dnZfqnPednZ2d@giganews.com> (permalink)

Cross-posted to 2 groups.

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On 1/1/26 23:55, John Levine wrote:
> According to c186282  <c186282@nnada.net>:
>>    If you know something ABOUT 'the pad' - like how
>>    many letters/numbers and how it's used - that may
>>    offer some attack options, at least narrow things
>>    down at bit.
> 
> No, a real OTP is unbreakable.  The problem is that for every byte
> of message you need a byte of key, so distributing the keys and
> using them correctly is a logistical nightmare.

   I'm aware of the practical problems ... the
   one-to-one ratio is a serious limitation.
   However IF the messages are really short,
   "Attack at 18:30 Hours" or "Nuke Launch
   Auth 10414", you can live with that.

   Well, maybe not after that last one ...

> Venona decrpted Soviet messages that used OTPs because
> sone of the putative OTPs in fact were used more than once
> which was enough to let the US crack them.

   RE-using pads, VERY not good. Indeed there were some
   similar incidents of NAZI operators either re-using
   the same Enigma rotor settings, or sending the exact
   same message with different settings, that helped
   the Brits crack their code.

   Still, thinking, IF you know enough ABOUT the exact
   'pads' being used and HOW they are used ... really
   MIGHT give you a heads-up. You'd at least know the
   RANGE of the coding scheme and HOW operators
   applied it to incoming messages.

   ANY insight into a coding scheme IS a weakness.

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                Re: Python c186282 <c186282@nnada.net> - 2025-12-30 15:55 -0500
                Re: one time pads, not Python John Levine <johnl@taugh.com> - 2026-01-02 04:55 +0000
                Re: one time pads, not Python Richard Kettlewell <invalid@invalid.invalid> - 2026-01-02 09:15 +0000
                Re: one time pads, not Python c186282 <c186282@nnada.net> - 2026-01-02 05:45 -0500
                Re: one time pads, not Python Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-01-02 20:59 +0000
                Re: one time pads, not Python Richard Kettlewell <invalid@invalid.invalid> - 2026-01-02 21:17 +0000
                Re: one time pads, not Python The Natural Philosopher <tnp@invalid.invalid> - 2026-01-03 08:26 +0000
                Re: one time pads, not Python Richard Kettlewell <invalid@invalid.invalid> - 2026-01-03 11:45 +0000
                Re: one time pads, not Python rbowman <bowman@montana.com> - 2026-01-03 20:56 +0000
                Re: one time pads, not Python c186282 <c186282@nnada.net> - 2026-01-02 05:14 -0500
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