In symmetric key encryption,a key must be ________ bits long or longer to be considered strong.(Choose the choice closest to the correct answer.)
A)40
B)56
C)128
D)1,024

Question

Quizplus · Accepted Answer

A key length of 128 bits or longer is considered strong for symmetric key encryption. Shorter keys can be easily compromised by brute-force attacks, and longer keys provide better protection against such attacks. Therefore, option C is the best choice. Options A and B are too short, and option D is unnecessarily long for most practical purposes.

In Symmetric Key Encryption,a Key Must Be ________ Bits Long