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.

RF power guide comparing dBm and Watts for link budgets
rf-tools

dBm vs Watts: a simple RF power explanation

Understand how dBm and Watts relate, why RF engineers use logarithmic power units, and how to convert values for link budgets and signal planning.

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.