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Article <4742d35c14f5b945a681c331e6661d57e8bb8b96@i2pn2.org>

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From: Stefan Claas <pollux@tilde.club>
Newsgroups: sci.crypt
Subject: Re: Inspired by Chris's HMAC cipher
Date: Thu, 17 Oct 2024 19:25:06 -0000
Organization: Ch1ffr3punk5
Message-ID: <4742d35c14f5b945a681c331e6661d57e8bb8b96@i2pn2.org>
References: <d362d3df17bfa32425c931d333a3a53be0c31bd0@i2pn2.org> <ve1fqq$1r205$1@dont-email.me> <e21b4f8f4c4c60ee76caf01ad8b5a13a329ad51b@i2pn2.org> <3fdb83dbfe35a57d62d07ea352ccc53a9b6e01cf@i2pn2.org>
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Stefan Claas wrote:
> Stefan Claas wrote:
> > Chris M. Thomasson wrote:
> > > On 9/20/2024 4:17 AM, Stefan Claas wrote:
> > > > I came up with the following idea.
> > > > 
> > > > Register a webpage at nekoweb.org, use an API key
> > > > and send encrypted messages to the web page, which
> > > > later Bob and Alice can decrypt.[...]
> > > 
> > > To decrypt use the default key, except click on the SHA512 radio button,
> > > then click decrypt:
> > > 
> > > http://fractallife247.com/test/hmac_cipher/ver_0_0_0_1?ct_hmac_cipher=a4f7cb5f3c7a0957d9517ad740b06a5d13a02e0affcb2882f700e388eec93f650c92e3b451915f04d2c0dd45f13e1ad5bfad03552937e2ff2602ec88dc3ccdce8b3076ec0addad4b41123297542709c292bb836850057363dbd2e7c7eb6f237db3e3d3d891600c880b92bbbe0b293a34bbc4994c81dba3deef421247965b01ef1cfca2ac91fc73b1511997cb09907e
> > 
> > Hi Chris, please reply here in plaintext. I do not have the passwort anymore.
> 
> Or for further communications, I would prefer that you use my minicrypt too,
> because then we do not need to visit the WWW, for encrypted communications.
> 
> My pub key (save it as stefan.pem):
> 
> -----BEGIN PUBLIC KEY-----
> tRxoeAmoI+0ygSbUYHBRpbYBDkC9+Q3rSTchzSXFHrU=
> -----END PUBLIC KEY-----
> 
> https://github.com/706f6c6c7578/minicrypt

Your ciphertext is also longer than minicrypt ciphertext.

Your message with your HMAC cipher:

a4f7cb5f3c7a0957d9517ad740b06a5d13a02e0affcb2882f700e388eec93f65
0c92e3b451915f04d2c0dd45f13e1ad5bfad03552937e2ff2602ec88dc3ccdce
8b3076ec0addad4b41123297542709c292bb836850057363dbd2e7c7eb6f237d
b3e3d3d891600c880b92bbbe0b293a34bbc4994c81dba3deef421247965b01ef
1cfca2ac91fc73b1511997cb09907e

Your message with my minicrypt cipher:

RzJ1JQ9XcXuvqozXkVDzTMOLVwOcZTboSrj+16/gZmU+l/0wrLy1Lj6tu+o24QHJ
Oo7OZ2XXhbf6PqdQ4mpGxDOB7QuasdrnKwPLUNrnUPgXgimjl/3f1HRcJz6pBQf2
Ywgh1TCpiZnydd+Clt8uj4dbXHYpSSBkG0NIchAauixcHzXAPlME233RW8VrddMi
tAYbJptlqHLB

-- 
Regards
Stefan