Hash Guides — Practical guides on hashing, checksums, and security | AG HASH

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We've put together how hashes and checksums are actually used and which algorithm fits each situation. Click any guide to read more.

Verifying Downloaded File Integrity — How to Check a Checksum

How to use a hash to confirm a downloaded file wasn't corrupted or tampered with

MD5 vs SHA-256 — Which Hash to Use and When

A guide to choosing a hash algorithm by speed, security, and use case

Hash Function Basics — One-Way, Collisions, and Salt

Understanding what a hash is and why it can't be reversed

Storing Passwords — Do It Safely with Salt, bcrypt, and Argon2

Why a plain hash isn't enough and how to hash passwords correctly

Verifying Webhooks and API Signatures — A Practical HMAC Guide

How to use HMAC to confirm a request is genuine and untampered

SHA-256 vs SHA-512 — Which to Use and When

Same SHA-2 family — the differences in length, performance, and security

Checksum vs Cryptographic Hash — The Difference Between CRC32 and SHA

Detecting accidental errors and preventing malicious tampering are not the same

Where Hashes Are Used — Git, Blockchain, and Deduplication

The real-world uses of hashes hidden throughout everyday development