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Groups > comp.security.unix > #249
| From | William Unruh <unruh@invalid.ca> |
|---|---|
| Newsgroups | comp.security.unix, sci.crypt |
| Subject | Re: Patterns |
| Date | 2024-02-20 23:47 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <ur3dlm$2ob56$2@dont-email.me> (permalink) |
| References | (1 earlier) <uqgk8m$28cuj$1@dont-email.me> <uqhgi2$2gjm1$2@dont-email.me> <uqj7eo$2q28i$3@dont-email.me> <uqln3h$2pbms$1@i2pn2.org> <ur34f6$2mh1p$1@dont-email.me> |
Cross-posted to 2 groups.
On 2024-02-20, Chris M. Thomasson <chris.m.thomasson.1@gmail.com> wrote: > On 2/15/2024 11:02 AM, Stefan Claas wrote: >> Chris M. Thomasson wrote: >> >>> On 2/13/2024 8:45 PM, Rich wrote: >>>> In sci.crypt Chris M. Thomasson <chris.m.thomasson.1@gmail.com> >>>> wrote: >>>>> On 2/12/2024 5:30 PM, The Doctor wrote: >>>>>> Deos anyone how what encryption is being used here? >>>>>> >>>>>> *1234567890ABCDEF01234567890ABCDEF0123456 >>>>> >>>>> None? lol. just kidding. Humm... >>>>> >>>>> Some combination of plaintext, secret key and cipher algorithm >>>>> generated it. Probably, the plaintext was hand crafted? ;^) >>>> >>>> As Jacob correctly pointed out, if one knows the message, one can >>>> then 'hand craft' a one-time-pad to generate exactly this output >>>> from that message. >>> >>> Or even the other way around? If one knows the OTP (Bob and/or >>> Alice), they can create a special plaintext that generates this >>> output for fun. >> >> How would you do this? I mean the OP IMHO does not show an encrypted >> string, done with an OTP. OTPs nature is that it does not include >> patterns and is totally random. > > If Bob and Alice have access to the same OPT, one of them can create a > special plaintext that can give the message in the ciphertext, or > whatever... Think about it... ;^) Yes, Just do the inverse of the OTP (if it is just xor then xor is also the inverst) and run it over the encrypted text and get what would have to have beenused to generate that encrypted text. But one of the absolutely critical things about OTPs is that it should be irremediably destroyed after it is used to encrypt the message. So only the person who ha not already used the OTP should have the OTP. > > >> >> Even if this string is not encrypted and only encoded, how would one >> get such pattern from plain text and convert it back to plain text? OTP xor PlainText=EncryptedText OTP xor EncryptedText=PlainText. >> >> It had been best if the OP had posted a reference URL ... >> >> Regards >> Stefan >
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Patterns doctor@doctor.nl2k.ab.ca (The Doctor) - 2024-02-13 01:30 +0000
Re: Patterns Jakob Bohm <jb-usenet@wisemo.invalid> - 2024-02-13 16:44 +0100
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-13 12:43 -0800
Re: Patterns Rich <rich@example.invalid> - 2024-02-14 04:45 +0000
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-14 12:22 -0800
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-15 20:02 +0100
Re: Patterns Rich <rich@example.invalid> - 2024-02-15 19:51 +0000
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-15 21:20 +0100
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-15 18:39 -0800
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-16 17:57 +0100
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-16 18:07 +0100
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-16 12:26 -0800
Re: Patterns William Unruh <unruh@invalid.ca> - 2024-02-17 00:25 +0000
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-16 17:12 -0800
Re: Patterns Rich <rich@example.invalid> - 2024-02-17 05:39 +0000
Re: Patterns William Unruh <unruh@invalid.ca> - 2024-02-18 21:04 +0000
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-20 13:09 -0800
Re: Patterns Richard Harnden <richard.nospam@gmail.invalid> - 2024-02-20 21:55 +0000
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-20 14:15 -0800
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-20 14:17 -0800
Re: Patterns doctor@doctor.nl2k.ab.ca (The Doctor) - 2024-02-20 22:17 +0000
Re: Patterns William Unruh <unruh@invalid.ca> - 2024-02-20 23:47 +0000
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-21 19:24 +0100
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-22 16:21 -0800
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-23 15:00 +0100
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-23 19:59 +0100
Re: Patterns "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-02-23 12:23 -0800
Re: Patterns Stefan Claas <pollux@tilde.club> - 2024-02-24 20:25 +0100
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