Geek asks and answers

How to determine your strength of the encryption algorithm in bits?

I am developing an encryption algorithm. The algorithm is symmetric (one key).

How do you measure the strength of algorithms in terms of bits? Is key length an algorithm strength?

EDIT:

Lesson 1 . Do not develop an encryption algorithm, AES and others. designed and standardized by scientists for any reason

Lesson 2 . The strength of encryption algorithms is not measured in bits, the size of keys. The strength of an algorithm is determined by its design. In general, an algorithm using a larger key size is more complex than brute force and therefore stronger.

+3
source share
6 answers

-, - ? , . . - . , .

AES RSA . , . RSA - . , , . AES - . . RSA . AES . RSA , AES .

, "128- ", . , , , . , , , .

, . , , , .

, AES 128- AES "", , 2 ^ 128. , "" ( ). ( ) , .

. , AES, . RSA - . , , . , RSA . , . RSA-128 . RSA 1024 +.

DES 56- , , - .

, . , : http://www.schneier.com/paper-self-study.html

FEAL - . . , , " ", .

+12

. .

( , - ), . ( , ) , ( ).

, "" . (.. - ), , , .

, 1024- , , , 256- ( , ).

, , , .

+5

, , . - .

:

  • . , .
  • . - . .
    Warning - this criteria is just for playing arround, doesn't shows real encryption scheme strength !

, - , .

+2

, ...

.

, ASCII- A-Z, a-z, 0-9, 62 - 10- 62 ^ 10. 256 , 0x00 - 0xFF, 10- 256 ^ 10 ( 10 * 8 = 2 ^ 80).

+1

" " NIST ( ), : NIST SP 800-57 1, 5.6.1 " ".

SP 800-57 1 NIST: http://csrc.nist.gov/publications/PubsSPs.html#800-57-part1

: http://csrc.nist.gov/publications/nistpubs/800-57/sp800-57_part1_rev3_general.pdf

"" " , " "", 5.6.1 . 2 " ", , AES, RSA ECC.

.

+1

- " , AES ". , , , , , . , 40- AES ( 2 ^ 88 , 128- AES), 40 , , 64 000 -.

, -, . RSA.

, , , - , " " . - .

0

More articles:


All Articles