Introduction - If you have any usage issues, please Google them yourself
The Data Encryption Standard (DES, /ˌ diː ˌ iː ˈ ɛ s/ or /ˈ dɛ z/) was once a predominant symmetric-key algorithm for the encryption of electronic data. It was highly influential in the advancement of modern cryptography in the academic world. Developed in the early 1970s at IBM and based on an earlier design by Horst Feistel,