This requires that the hash function withstand differential, length extension and other attacks. We have published a formal security analysis for HighwayHash. New cryptanalysis tools may still need to be developed for further analysis. Strong hashes are also important parts of methods for protecting...
Typical hash functions take inputs of variable lengths to return outputs of a fixed length. A cryptographic hash function combines the message-passing capabilities of hash functions with security properties. Hash functions are algorithms that determine how information is encrypted. For example, Secure ...
Very fast, high-quality hash function, discrete-incremental and streamed hashing-capable (non-cryptographic, inline C/C++) 26GB/s + PRNG - avaneev/komihash
Migrate Git from SHA-1 to a stronger hash function. Background At its core, the Git version control system is a content addressable filesystem. It uses the SHA-1 hash function to name content. For example, files, directories, and revisions are referred to by hash values unlike in other ...
(bob);// 48f370a772c7496f6c9d2e6d92e920c87dd00a5c/*** hash object, ignore specific key(s)*/hash(peter,{excludeKeys:function(key){if(key==='friends'){returntrue;}returnfalse;}});// 66b7d7e64871aa9fda1bdc8e88a28df797648d80/*** md5 base64 encoding*/hash(peter,{algorithm...
敌手以某种方式得到了若干条使用同一密钥进行加密的明文-密文对(plaintext-ciphertext m/c pairs)。在此基础上,敌手尝试获得其他用同一密钥进行加密的密文的明文信息 已知明文攻击实例:某个机密文件若干年后公开,之前观察过密文的敌手即可获得明文-密文对。移位加密和替换加密都能够很轻易的用已知明文攻击进行破解 ...
Uses 2-spaces as the indentation or a tab if it's required (for example: Makefiles) Uses lower-case function and variable names Avoids the use of!and uses positive conditionals wherever possible (e.g.,if (foo == 0)instead ofif (!foo), andif (foo)instead ofif (foo != 0)) ...
In data structure Hash, hash function is used to convert a string(or any other type) into an integer smaller than hash size and bigger or equal to zero. The objective of designing a hash function is to "hash" the key as unreasonable as possible. A good hash function can avoid collision...
(10, $precision) / 2; } /** * create binary encoding of number as detailed in http://en.wikipedia.org/wiki/Geohash#Example * removing the tail recursion is left an exercise for the reader * * Author: Bruce Chen (weibo: @一个开发者) */ private function binEncode($number, $min, ...
We propose denoting a realization of HMAC that uses a hash function H with t bits of output as HMAC-H-t. For example, HMAC-SHA1-80 denotes HMAC computed using the SHA-1 function and with the output truncated to 80 bits. (If the parameter t is not specified, e.g. HMAC-MD5, then...