Third, the hash function should be fast. Remember, the whole point of using hash functions in distributed systems is to make data storage and retrieval more efficient. If the hash function takes too long to calculate the 'tag', it kind of defeats the purpose. Lastly, the hash function shou...
This is explicitely seen in the "One at a Time hash" function. In fact, for each byte only a few very simple operations are performed -- a final short sequence of operations is required at the end. These operations at the end are required to make sure the bits in the last few bytes...
If the hash function is 'weak', attackers can easily generate 'hash collisions' (inputs mapping to the same hash values) that are independent of the seed. In other words, certain input messages will cause collisions regardless of the seed value. The author of SipHash has published C++ progra...
cycl./map: The result of the Hashmap test for /usr/dict/words with fast C++ hashmap get queries, with the standard deviation in brackets. This tests the inlinability of the hash function in practise (see size). The smaller the better. size: The object size in byte on AMD64. This af...
Using hash functions in parallel (e.g.https://lore.kernel.org/git/22708.8913.864049.452252@chiark.greenend.org.uk/) Objects newly created would be addressed by the new hash, but inside such an object (e.g. commit) it is still possible to address objects using the old hash function. ...
NTLM (NT LAN Manager) The NTLM protocol was a practical solution for Windows devices for a long time: A user just had to sign in once and then gain direct access to various network services. However, this authentication method is now considered unsafe and is no longer in use. How does ...
A well-designed hash function, h, distributes those integers so that few strings produce the same hash value. To build a hash table, the programmer uses the hash value of a string, modulo the table size, as an index into a table. Handling collisions is a key issue in hash table ...
Using hash functions in parallel (e.g.https://public-inbox.org/git/22708.8913.864049.452252@chiark.greenend.org.uk/) Objects newly created would be addressed by the new hash, but inside such an object (e.g. commit) it is still possible to address objects using the old hash function. * ...
Two examples of computational graphs for some simple functions are shown in Figure 3. Note that computational graphs are widely used for back-propagation on neural networks. Apparently, any DNN model can be represented as a computational graph. Figure 3. The computational graph for function 𝑓(...
PRVHASH core function can be used as a PRNG with an arbitrarily-chosen (practically unlimited) period, depending on the number of hashwords in the system. PRVHASH64 Please see theprvhash64.hfile for the details of the basic hash function implementation (theprvhash.h,prvhash4.h,prvhash42....