Re: discover encryption method

[Tofig Gasanov <gtofig () yahoo com>]

Just an interesting notice: first come 4 letter code,
which are separated from rest of the cipher by 'AA'.
And the length of the cipher is directly proportional
to the first 2 letters of the 4 letter code if looked
from the end. That is if code is ended with 'D' it is
longer than if it is ended with 'C'. But could be just
a coincidence, and I don't see how it can help you :P


--- richard () tortoise demon co uk wrote:

> On Tue, 8 Jan 2008 11:15:13 +0200 (IST), Alexander
> Klimov
> <alserkli () inbox ru> wrote:
>
> > Post some examples of `encryption' of, say, `a'
> > repeated different number of times and same for
> `b': if the method is
> > weak you will see repetitions in the ciphertext or
> constant difference
> > between results for `a' and `b'.
>
> Thanks for your help Alexander. I can't see anything
> repeated here, or
> any constant difference.
>
> Below shows first the plaintext followed by the
> corresponding
> ciphertext.
>
> Regards,
> Richard
> /***********************/
>
>
> a
CCMCAAJEGDBEICEHOPHBAEAAJEOOEDEBCACCCDCLJHPMJHGLOAHGLAOIOEEEJNNEIIEINDICECHPGEGAACDBIELEEDFFCOAAEIBNKAIAEBGAGCAFADOAKEBPGLHDAAKGCPIEKDAKACEGOBMCDAKGMJDAIBKAGACEMEJAOD
> aa
BOBDAAHGDMJNEEMBIDOGCGACFEEDOEHBOCIDCBICOBFHABEFKANCNBFEGBHPEAFDCNIDKBAFECLPDLBHGFCGAILAGEHJJCHFADBEMEKHIENFHLACEBKLJKHDEDEGNECBKEBDLNOEDFJBEHJMHEAGMCHPACKJICACACODMDHELAHOLIHOJCGKOAJNGB
> aaa
LMIDAADAICICCEILKFHHGFBKMBIENOLBKCLNLOACKBNKAGACGBLDIEAOGIAFCFOCKEFDDLLFAAIEMECDAFECFGMMGABEEBLEOEHPCDONNCJPNFIABPMCHIEIHNPKBKKIHAIJMLKPCLPGACFOJCIEEGBHIFIGMCAPDFGECBKCABIAIAGLPNMFECPNCAKCACJJEDJLOBBBGEGEEDACKF
> aaaa
JJOCAAACEEAJKMIANHBMMHBEGBEGAFFBCFDNCOKJHLMECCNGOEACECHPCBIMKMANOIJBJJPHAFHDOCAFMDGGEAJEOIMCMPAHIBCDIAKBIDBFACAMLEDNDLPNCDHNBJKBKECKDKADLEKGIKLDADBFEBIEOMELGEMLCGICACBEMCBEAA
> aaaaa
FGFDAAHHIADJEDFPHLKBKAMACDELKEJBKDBJEBEIAAKDEDBEACGABLKGABLFJMMOLCDKNAACMCNAKEMAHMHDACKBODNDKNLDICMDFNIHHDJFEBNGMFMBGCDDJABEMDACIEPNCBHNNGLNBHNLOJAOMNLDGABFOFMJGDBFIBBFEKBMJJCDIPICCIGGCNDAMEDEKFGAOE
>       
> b
EADDAAEGKNJBKOMJCDMFKBDAAEMBGAIBOELEEEHHOLLEIFCFNMLGDFIIAJCDEFELMCADBBOFNBGAIDBKAMPIBBCCCCDEKEKDKFPGIJCIHAHHACLFGKPBJBDBIAKBMBJKBHCOEKMJKABNONAFMEGLICNCMEIGEAIAGECEOAHHBFDOAEBECBNJFBLDKDGAKC
> bb
ELBDAAHPAFAPOKIGGAHPACEAPHLAECHBMBBJNECDAEBHKDLHOHCMAEIDOBJFDACEEDFHODLDCFDBMODEEACLPBAJCEHIIFGPNBIBEIHDABIDAADCMDFBHBNGECGKIBAFCBICCDBEGEDGJDIHBKACACHOGIIEDFNKAOKDIDPBADKBEFPNOEOGAIJIPF
> bbb
DLPCAAIDKBDAIEELKCPFKDICOAAFOCGBGCPGADADGGDAACCALGDECBJKAPBHICCMLENGGBJOOMKCECDCKACEEEPNIAKDOBNIIPKBEALFCAHHGAAPCNMHOHIKKABDCCCPPPNLFEGBFFOKCNDCAAHIJPMMCDFCLILEDCEIDBIADDAMLFGHAF
> bbbb
OGOCAAMEEAKBJFHDOEBFGDAFCBMIBFFBGBEFFAJLFHJBEBHLGACEIBDCCCPNKEKCCAEILABMPGIDIDAOLEDECGICACBEODNNFBAOJNNMFIDBEPPHKCOGICJBKBFKJMHCBGAHCEGKPCHPAAJPHBMDCICEAFBFEDPPHEBDIEDCIAGCHJ
> bbbbb
BEFDAAIFEEBFIFMKKNKEAIDCGFDCKFJBMCHLCAAADACKCEAEADIJDOBFKIEAFBKGOBEICDPBAFHJGGJKMLIBHLCHLGCEIACEKADDHDDAGEHHMDDMCEJBEEPILLOGEBMAAEJDKDJFKCPKKFPNODPJACGPGLKGEGHGPPBAMIHDACGGENBFMBIDGDGAEFIDOFIEEKJBOA
>



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