What determines the strength of a secret key within a symmetric key cryptosystem?

What determines the strength of a secret key within a symmetric key cryptosystem?
A . A combination of key length, degree of permutation, and the complexity of the data- encryption algorithm that uses the key
B . A combination of key length, initial input vectors, and the complexity of the data- encryption algorithm that uses the key
C . A combination of key length and the complexity of the data-encryption algorithm that uses the key
D . Initial input vectors and the complexity of the data-encryption algorithm that uses the key

View Answer

Answer: B

Explanation:

The strength of a secret key within a symmetric key cryptosystem is determined by a combination of key length, initial input vectors, and the complexity of the data-encryption algorithm that uses the key.