SHA 256 is hash and therefore asymmetric, I guess you encrypt it by some symmetric cypher. You should enforce strong passwords for the encryption because otherwise it might not be very safe.
You are viewing a single comment's thread from:
SHA 256 is hash and therefore asymmetric, I guess you encrypt it by some symmetric cypher. You should enforce strong passwords for the encryption because otherwise it might not be very safe.
You are right about the first part. Sha-256 is a hash function, but it's not symmetric encryption.
symmetric encryption dictates a given key
Kcan be used to both transform plain text into cipher text and vice-versa.A hashing function cannot be reversed because it's a large to small key space function, meaning it's only one way, there's no reversing a hash, unless you try all possibilities until you get the result.
There are publica tables on some hashing algos, they are giant covering hashs for the most known combinations.
But, a SHA-256 as the name suggests generates a 256-bit output.
Since one bit can be represented with two distincts values (i.e. 0 and 1)
we have all the possible combinations being
2^256which is a number I not even know the name.about the string password, that a myth that must fall at any cost.
Humans can NEVER produce strong passwords. It's up to the software engineers and cryptographers to move from a low entropy input to a large entropy input while balancing the computational recurrent cost.
:)
Eloquently put ;)