DES.
DES (Data Encryption Standart) , .. , . I 1977 .
DES 64 16 , 56 . DES, Electronic Code Book () Cipher Block Chaining ().
IDEA.
IDEA (International Data Algorithm) . (Lai) . (Massey) 80-. 64- 128- (rounds). , . , , IDEA 16- . IDEA DES.
IDEA . , .
RC2 RC4.
RC2 RC4 (Ron Rivest) RSA Data Security. "R" "Ron's d" "Rivest Cipher ()". R2 DES DES. DES, . R2 RSA Data Security. R2 , DES.
R2 R4 128 IDEA DES. R2 R4 , , DES .
RSA.
RSA (: Rivest, Shamir Alderman) (public-key) , 1977 . .
RSA . , DES 100 RSA, 1000 10000 , .
28147-89.
28147-89 , 1989 , . , 70- 8- , ( ). (), 89- , , ( ). 90- .
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DES .
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