codebench Blog https://codeben.ch/blog Short, practical explanations of the concepts behind developer tools. en Mon, 07 Sep 2026 00:00:00 GMT UUID v4 vs v7: Which Should You Use for Database Keys? https://codeben.ch/blog/uuid-v4-vs-v7 https://codeben.ch/blog/uuid-v4-vs-v7 Mon, 07 Sep 2026 00:00:00 GMT UUID v4 is random; UUID v7 is time-ordered. Learn how each is built, why v4 fragments B-tree indexes, and when v7 is the better primary key. uuid database identifiers Bcrypt Cost Factor Explained: Choosing the Right Work Factor https://codeben.ch/blog/bcrypt-cost-factor-explained https://codeben.ch/blog/bcrypt-cost-factor-explained Tue, 01 Sep 2026 00:00:00 GMT The bcrypt cost factor controls how slow each hash is. Learn how it scales, what a bcrypt hash string contains, and how to pick a value for your servers. bcrypt passwords security hashing What Is a JWT? Structure, Signatures, and Common Mistakes https://codeben.ch/blog/what-is-a-jwt https://codeben.ch/blog/what-is-a-jwt Tue, 25 Aug 2026 00:00:00 GMT A JSON Web Token is three Base64URL segments joined by dots. Learn what each part holds, how the signature works, and why the payload is readable by anyone. jwt authentication security Base64 Is Not Encryption: How It Works and When to Use It https://codeben.ch/blog/base64-is-not-encryption https://codeben.ch/blog/base64-is-not-encryption Tue, 18 Aug 2026 00:00:00 GMT Base64 turns binary data into printable text, expanding it by a third. Learn how the encoding works, why it offers zero secrecy, and when it is the right choice. base64 encoding fundamentals