Blog
By Siavash Ghanbari · Founder of Emojar
#️⃣5 Practical Uses for MD5, SHA-256 and HMAC Hashes
Verify downloads, debug webhook signatures, build cache keys, spot duplicates, detect changes. Real uses for hash functions, and which algorithm fits each.
Tool GuideDeveloperHashingSecurity🛡️How Password Strength Checkers Estimate Crack Time
See how a strength checker turns a password into bits and crack times, why P@ssw0rd! scores as very weak, and how a breach check works without sending it.
Tool GuideGeneratorsSecurityPasswords🧂How to Choose a bcrypt Cost Factor (and Read a bcrypt Hash)
Cost 10, 12 or 14? How the bcrypt work factor trades login speed for cracking resistance, how to measure it, and what each part of a $2b$ hash means.
Tool GuideDeveloperSecurityPasswords🔣How to Generate Secure Tokens, API Keys and Coupon Codes
A practical checklist for random strings - picking the right alphabet and length, avoiding confusing characters, and keeping codes unique and unguessable.
Tool GuideGeneratorsSecurityDevelopers#️⃣How to Verify a Downloaded File with a SHA-256 Checksum
A step-by-step walkthrough for checking that an installer or ISO is exactly what the publisher released, plus what a mismatch means and what it can't prove.
Tool GuideGeneratorsSecurityChecksums⏱️How TOTP 2FA Codes Are Calculated, With a Worked Example
A six-digit 2FA code is just a shared secret plus the current time, run through HMAC. Here's the math step by step, checked against the RFC 6238 test vectors.
Tool GuideDeveloperSecurity2FA#️⃣SHA-512 Myths: Hashing vs Encryption, Speed and Security
SHA-512 can't be decrypted, isn't a safe password store on its own and is often faster than SHA-256. Six common myths about hashing, corrected.
Tool GuideGeneratorsSecurityHashing🗝️Passphrase vs Password - Which Should You Use, and When?
Random-word passphrases and random-character passwords can be equally strong. Here's how to choose between them and how many words you really need.
Tool GuideGeneratorsSecurityPasswords🔒PDF Password Protection Checklist Before You Hit Send
Encrypting a PDF only helps if the password is strong and shared safely. A practical checklist for protecting tax forms, payslips and contracts with AES-256.
Tool GuidePDFSecurityPasswords🔑How Strong Is a Random Password? Entropy, Explained
Why a 16-character random password has about 104 bits of entropy, what that means in guessing time, and how a secure generator picks every character.
Tool GuideGeneratorsSecurityPasswords