. :
ECB (Electronic Code Book);
CBC (Cipher Block Chaining);
CFB (Cipher Feed Back);
OFB (Output Feed Back);
, ,
K , M , C .
3.5.1. " "
(ECB) , . .
. , . 3.6.
. 3.6. ECB. |
, . , , . , , , , , .
.
3.5.2. " "
(CBC) . , .
1. 2 (XOR) IV (Init Vector), .
2. .
3. IV .
.
/ , . 3.7.
. 3.7. CBC. |
, CBC , i . - ECB, . " " . , ( ) . (MAC Message Authentication Code). , .