Sha secure hashing algorithm computerphile

Download 1M+ code from okay, let's dive into the sha (secure hash algorithm) world, focusing on a simplified version and the underlying principles, drawing inspiration from the computerphile's explanation (though we'll go a bit deeper into code than they typically do). i'll provide a python example to illustrate the core ideas. *understanding hash functions in cryptography* before we get into sha specifics, let's quickly recap the role of hash functions in cryptography: *one-way function:* hash functions are designed to be *one-way*. this means it's computationally easy to calculate the hash of a message, but incredibly difficult (ideally, impossible) to reverse the process – to find the original message from its hash value. *fixed-size output:* a hash function takes input data of any size and produces a fixed-size output, called a hash value or a digest. sha-256, for example, always produces a 256-bit (32-byte) hash. *deterministic:* the same input message will always produce the same hash output. *collision resistance:* it should be extremely difficult to find two different messages that produce the same hash value (a collision). while collisions are theoretically possible with any hash function (because the input space is infinite, and the output space is finite), a good hash function makes them computationally infeasible to find in practice. *avalanche effect:* a small change in the input message should result in a drastically different hash output. this prevents attackers from making small adjustments to a message in an attempt to find a message with a similar hash. *sha (secure hash algorithm): a family of algorithms* sha is not a single algorithm, but a family of cryptographic hash functions developed by the national security agency (nsa) and published by the national institute of standards and technology (nist). the sha family includes: *sha-0:* the original version, published in 1993. it was quickly found to have weaknesses ... #SHA #SecureHashing #bytearray SHA secure hashing algorithm Computerphile cryptography data integrity hash functions digital signatures cybersecurity information security SHA-256 SHA-1 hashing techniques blockchain password security data verification