Hot answers tagged skein
3
Internally, Skein-1024 uses the Threefish-1024 compression function and is extended to 1024 bits of internal state whereas Skein-512 uses the Threefish-512 compression function. There are a few additional changes but they are very similar (just like SHA-256 and SHA-512 are, for instance).
The tweak handling is, however, the same since all Threefish variants ...
1
The main reason for designing a cryptographic hash function using an
output transformation is flexibility. In the following, I try to
motivate the need for an output transformation.
For example, SHA-256 has no output transformation and a fixed
output size of 256-bit. What happens if you truncate a SHA-256 hash
value? In this case, there are no security ...
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