Cyber Security • RF • Conversions
Illustration of SHA-256 as a digital fingerprint for data integrity
cyber-security

What is SHA-256 and when should you use it?

A practical guide to SHA-256: what it does, how it differs from encryption, where it is useful, and when you should choose a password hashing algorithm instead.

Security analysis screen for token and claim validation
cyber-security

JWT common security mistakes

Learn the JWT mistakes that cause real authentication bugs: alg none, missing exp, long-lived tokens, sensitive payloads, weak verification, and unsafe browser storage.

Cyber security token structure and API authentication concept
cyber-security

What is a JWT token?

A practical explanation of JSON Web Tokens, how JWT header, payload, and signature parts work, and how to decode a JWT safely.

Hash identifier guide showing length and character set clues
cyber-security

How to identify an unknown hash quickly

Learn a practical workflow for identifying unknown hash formats using length, character set, prefixes, separators, and common false positives.

Cyber security hashing guide showing one-way fingerprints and verification
cyber-security

What is hashing in cyber security?

A beginner-friendly guide to cryptographic hashing, integrity checks, password storage, digital fingerprints, and common mistakes to avoid.