Timeline for Convert SHA-256 to SHA-1 and MD5 - Increase bit length/entropy?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 21, 2016 at 13:15 | comment | added | LvB | Assuming a longer string than the Sha512 was used to calculate the sha256, you always lose entropy (you have less bits in the pool to guess to get this specific state). unless I am misunderstanding the hashing algorithms I believe they will yield a lower amount of entropy bits. | |
| Jul 21, 2016 at 13:07 | comment | added | rugk | So although the resulting string is longer you always (?) loose entropy in this conversion? Might it not at least stay the same? | |
| Jul 21, 2016 at 11:20 | comment | added | LvB | can be but depends on the actual hashing algorithm. In this case where a sha256 is fed into sha1 and md5 yes you lose entropy | |
| Jul 21, 2016 at 11:02 | comment | added | symcbean | Since a hash must contain less information then the plaintext, and this is 2 hashes of the same "plaintext" then surely it has less entropy than the original? | |
| Jul 21, 2016 at 10:51 | history | answered | LvB | CC BY-SA 3.0 |