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Results tagged with sha
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user 54284
Secure Hash Algorithm is a family of cryptographic hash functions published by NIST. This includes SHA-1, and the SHA-2 and SHA-3 families of functions. SHA-1 is deprecated for all usages.
44
votes
Accepted
Why not just use a small but unusual number of hashing rounds?
That's why you don't use SHA or MD5 for password storage: they are fast hashes. …
- 55.5k
4
votes
Is it possible to generate a file with a given sha256sum checksum?
As Peter reminded me on the comment, the SHA hashes are cryptographically secure hashes, and that means that a minimal change on the input will generate a very large difference on the output. …
- 55.5k
1
vote
Accepted
Mapping arbitrary strings to hashes of 10 character length - time to crack it and collision ...
Not possible to calculate unless we know the difficulty of the hash.
A hash function is deterministic, so the same string will always return the same output. For outputting 60 bits, you could use an …
- 55.5k
0
votes
Conversion of user passwords from SHA-1 & encrypting plaintext data
You will have to wait the users to login to change the passwords. As soon as you validate the password, re-encrypt it with the new algorithm and save it on the database.
But don't use the user passwo …
- 55.5k
0
votes
Reversible Hash Function?
ELI5: What is a hash?
Imagine you have trouble putting things on your cupboard, so you create a system that defines what drawer you will put everything depending on the barcode. You have 7 drawers, s …
- 55.5k