Hands-On Cybersecurity with Blockchain

Cryptography – digital signature and hashing algorithm

Cryptographic hashing is a way to generate a fixed-length output against any given length of input string. The output is named hash or message digest, and is designed to protect the integrity of any kind of data, such as a file, media, or text. Only one message digest is assigned to protect a specific input or sensitive information. A small change made to the input data results in a drastic difference in the result, which makes it almost impossible to predict the data either in- motion or at rest. There are various ways to produce the hash or the message digest. In the world of cryptocurrency, and Bitcoin being a popular example, the SHA-265 algorithm is used to produce a fixed-length ...