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Results tagged with hash
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user 1401
A cryptographic hash algorithm is a function which takes a variable size input and produces a fixed size output. The algorithm makes it difficult to find two inputs with the same output or reconstruct the input from the output.
5
votes
2
answers
442
views
Do MD5's weaknesses affect Oplop?
Generate the MD5 hash of the concatenated string.
Convert the MD5 hash to URL-safe Base64.
See if there are any digits in the first 8 characters. If no digits are found ...
a. … Is it secure when the attacker can access all 128 bits of the hash, or does the hash need to be truncated (as it is in Oplop) in order to prevent collision attacks? …
- 585
19
votes
4
answers
6k
views
Is SHA-256 secure as a CTR block cipher?
For each nth block needed for the length of the plaintext, XOR x with n and hash it with SHA-256 to form b[n]. …
- 585