??????? ????

??????? ????? ????????????? ??????? ??????? ????? ????? ?????????????. ????????? ?????? ??????????? 3 ?????? ????. ?????????? `B` ??????? `E` ???????? ???????.

?????????????? ??????? ????? ???????? ?????, ??????? ????? , ????? ????????? ?????????????? (?????????? shift cipher ) ? ????????? ??????? ??????? ???. ?? ????????? ??????? ???????? ???????? ??????? ??????? , ??? ?????????? ??????? ??? ??????? ??????? ???? ?????, ??????? ?????? ??????????? ??????????? ?????. ?????????, ?? ???? ???????? ???? 3-?, A ???????? ?????? D-??, B ??????? E ?? ?.?. ?? ?????? ????? ?????? ??????? ??????, ?????? ??? ???????? ????????? ?? ??????, ???????? ??????????.

??????? ?????? ???????????? ????? ??????????? ???????? ????? . ??????????? ?? ????? ??????????? ROT13 -??. ??????????? ?????????????? ???????????? ??????? ????? ?? ??????? ????????? ??????????.

???????? [ ??????????? | ?????? ??????????? ]

???????? ????????? $k$ =3:

??????? ?????? : ABCDEFGHIJKLMNOPQRSTUVWXYZ

????????? ?????? : DEFGHIJKLMNOPQRSTUVWXYZABC

???????? ???????? ????? ????????????? ???????????? ???????. ?? ???? ??????? ????? ???? ??????????? ?????? (A = 0, B = 1,..., Z = 25), ??? ?????????? $x$ -?? ???????? ???????? n -??, ?????????? ??????????? ??????? ???????:

E_{n}(x)=(x+n)\mod {26}.

?????????? ???????????, ????? ???????? ?????????? ????????( ??? - n-? $n$ -?? ???????? ):

D_{n}(x)=(x-n)\mod {26}.

??????? ????? ?????????? ???????? ??? ????? ???????? ????????????, ?????? ???????? ?????????? ????????????. ?????????, ???????? ?????????? ??????? ??????? ????????. ?????? ?????? ???????? ??????? ?????? ?? ?????? ????????? ????? 4.

??????? ??????: ????????????????????????

????????? ??????: ????????????????????????

??????? ???? ???????? ???????? ???????????? ??????? ???? ??????????? ????? ?? ????? ????.

??????? ?? ?????????? [ ??????????? | ?????? ??????????? ]

??????? ???? ????? ??????????? ????? ?????? ?????????? , ???????? ???????? ????????? ???????? ????? 3 ????????, ???????? ????? ??????????.

? ... ?? ???, ????? ????? ?????????? ??????? ??????? ????????, ?????? ??????? ?????? ???, ??? ?????? ???????? ???????? ?????. ?? ???, ????? ???? ??????? ????????, ???????, ??? ?????? ????? ???-???: ??????? ?????? ???? ??????????? ??????, ?? ?????? A ???????? D, ?? ?.?.“ (???????, ??????? ??????? ???????? , ????? I, ????????? 56 [1] ???????????? 2011-02-01 ?????? Wayback Machine . .)

?????????? ?????, ??? ??????? ??? ??????? ??????? ????????? ?????????, ???????? ????????? ????????? ?? ???????, ???????? ????????, ??? ?? ??????? ???????? ??? ????????????, ???? ????????? ?????????? ????, ?????? ?? ????????????, ??? ???? ??? ????.

??????????, ??????? ?? ????? ????????? ????? ??????, ?? ???????? B-? A-? ????????, C-? B-? ???????? ?? ?.?. ????????? ???????????, ???????? AA-? X-?? ????????.“ (???????, ???????? ????????, 88.)

??????? ??????? ???? ???????, ??? ?????? ??????? ???????? ???? ???? ????????? ??????????, ????????? ??? ????? ?????????? (Aulus Gellius, 17.9.1?5).

???????? ????? ???? ??????? ?????? ???-???? ????????, ??????? ??????? ?????????? ???? ??????? ????? ????????. ????? ??????????? ????????????? ??????-????????? ??????????. ?? ??????-???????? ????????? ??????????, ??, ??? ???? ?????? ??????? ??????? ?????? ????????? ???????????, ????? ?????? ????????? ??????????.

????? ?????? [ ??????????? | ?????? ??????????? ]

????	?????????? ??????
0	`GVCTX SKVEQ QI`
1	`FUBSW RJUDP PH`
2	`ETARV QITCO OG`
3	`DSZQU PHSBN NF`
4	`CRYPT OGRAM ME`
5	`BQXOS NFQZL LD`
6	`APWNR MEPYK KC`
...
23	`JYFWA VNYHT TL`
24	`IXEVZ UMXGS SK`
25	`HWDUY TLWFR RJ`

??????? ???? ???????? ??????? ?????? ???????, ???? ?????? ????????? ??????? ?????????? ????????? ???????? ??? ?????????:

??????????????, ???????? ????, ??? ???????? ????? ??????? ???????, ?????? ????????????, ??? ?? ????? ??????? ????
??????????????? ????, ??? ????????????? ??????? ????, ?????? ???????????? ????? ????????????

?????? ???????????, ???????????? ??????? ?????? ??????? ????? ????????, ????? ???????? ???????? ??????? ???? ????? ???????????. ???????? ??????????? ???????? ???????????????????? ??????????? ?? ??????? ???????? ?????????? ?????, ???????? ??????? ?????????, ??? ???????????? ???????? ???? ??????? ????.

????? ???????????, ?????? ????? ????????? ???????, ?????????? ?????? ????? ??????? ????????, ????? ????????? ?? ???????. ????????? attaque par force brute , ??????? ??? ?? ??? ?????? ???????. ??????? ??????? ??? ?????????? ????????, ?????? ??????? ????? ?????? ?? ?????????? ??????? ???? ????? ??????? ???? (?????? ??????). ??????? ??????? ?????? ????????? GVCTX SKVEQ QI; ????? ?????? ??????? ?????????? ?????? ?????.

???????, ?? ??? ?? ???????? ???????? ???????? ???????. ?????? ??????? ???????? ???????? ??????? ????? ??????.

???? ??? ???? ????????? ??????, ????????? ??????? ??????? ????????? ?????????: ??????? ??????? ???????? ??????? ????????? ???????????. ???????? ????????? ????????? ???????? ????????????? ??????? ????????? ???????? ?????????????? ????????? ??????? ??????????? ????? ???????????. ?? ?????? ??????? ??????? ????????? ????????? ???????. ?????????, ?????????? ?????? E ?? T ??????? ?????? ?????????????, Q ?? Z ??????? ???????? ???????????? ???????.

?????????? [ ??????????? | ?????? ??????????? ]

David Kahn, The Codebreakers ? The Story of Secret Writing, 1967. ISBN 0-684-83130-9 .
F.L. Bauer, Decrypted Secrets, 2nd edition, 2000, Springer. ISBN 3-540-66871-3 .
Chris Savarese and Brian Hart, The Caesar Cipher, 1999 [2] ???????????? 2008-07-04 ?????? Wayback Machine . .

?????? ??????? [ ??????????? | ?????? ??????????? ]

??????????? ????????

????????? ?????????? [ ??????????? | ?????? ??????????? ]

( ????????? ) A Caesar shift decoder in Excel format allowing you to see all 25 possibilities simultaneously ???????????? 2007-10-10 ?????? Wayback Machine .
Cryptage en ligne
( ????????? ) Un autre outil de cryptographie ???????????? 2007-09-28 ?????? Wayback Machine . ???????????? ???????? ???????? ??????? brute force .
( ????????? ) Code Cracker ???????????? 2005-09-24 ?????? Wayback Machine . ; ???????? ????????, ??????? ??????????