How SHA-256 Works Step-By-Step | Boot.dev

SHA-2 (Secure Hash Algorithm 2), of which SHA-256 is a part, is one of the most popular hash algorithms around. In this article, we will break down each step of the cryptographic algorithm and work through a real example by hand. SHA-2 is known for its security (it hasn’t broken down like SHA-1) and its speed. In cases where keys are not generated, such as mining Bitcoin, a fast hash algorithm like SHA-2 often has the upper hand.

Source: How SHA-256 Works Step-By-Step | Boot.dev

Another New Record in Self-Cleaning Turing Machines | Something Something Programming

How long can a Turing machine program run when started on the blank tape before the tape becomes blank again? Of course, this will depend on the length of the program – how many states and colors it has. Even given these parameters, it is logically impossible to calculate how long a self-cleaning Turing machine can run. Any values that can be known have to be discovered empirically.

Source: Another New Record in Self-Cleaning Turing Machines | Something Something Programming