No matter how large or small the input, the output of a hash algorithm is fixed in size; for example, Bitcoin hashes are 256 bits long. See SHA.

With a strong hash function it is almost impossible to reverse the hash value to its original content. The National Security Agency (NSA) designed the SHA-1 cryptographic hash function 10 years ago.

Hash Function: A computational algorithm that transforms an input (or 'message') into a fixed-size string of characters, commonly known as a digest, structured to be computationally infeasible to ...

Since good cryptographic hash algorithms convert arbitrary inputs into “seemingly-random” hashes, it is not feasible to modify the input to make the hash predictable.

The vulnerability in the SHA-1 one-way hash function, which recently rocked the cryptographic world, is not seen as a threat to a new generation of one-time password products based on the ...

Cryptographer Bruce Schneier says the upcoming SHA-3 cryptographic hash algorithm is not much better than the current one As the U.S. Department of Commerce’s National Institute of Standards and ...

This hash function, named “Troika,” was developed by CYBERCRYPT’s expert cryptographers, and will lay a strong cryptographic foundation for the final IOTA protocol.

It turns out the fatally weak cryptographic hash function, along with its only slightly stronger SHA1 cousin, are still widely used in the transport layer security protocol that underpins HTTPS.

Schneier is part of the team of cryptographers who created Skein, a family of cryptographic hash functions that has been selected as one of the competition’s five finalists. The idea of ...