Security

MD5, SHA-1, and SHA-256 — When to Use Each

Checksums vs cryptography, deprecated algorithms, and security guidance for engineers.

Zovaty EditorialJune 2, 20261 min read

#hashing #cryptography #security

Hash functions: checksum vs security

Hashing maps data to a fixed-length digest. The right algorithm depends on your threat model.

Quick reference

MD5 — legacy checksums only; not for security
SHA-1 — deprecated for certificates; avoid for new designs
SHA-256 — general-purpose secure hash for integrity checks

Passwords are different

Never hash passwords with bare SHA-256. Use adaptive algorithms with per-user salt.

Generate digests locally using the Hash Generator.

Try it in Zovaty Tools

hash generator

Frequently asked questions

Can I use MD5 for passwords?

No. Use bcrypt, scrypt, or Argon2 for password storage. MD5 is not collision-resistant for security use.

JWT Security Basics Every Developer Should Know

Claims, expiration, signature verification, and common JWT mistakes in production apps.

1 min read

How to Create and Store Strong Passwords

Entropy, password managers, and why local generation matters for privacy.

1 min read

Why Client-Side Tools Protect Your Data

How in-browser processing keeps secrets off third-party servers — and when it is not enough.

1 min read

Security

MD5, SHA-1, and SHA-256 — When to Use Each

Checksums vs cryptography, deprecated algorithms, and security guidance for engineers.

Zovaty EditorialJune 2, 20261 min read

#hashing #cryptography #security

Hash functions: checksum vs security

Hashing maps data to a fixed-length digest. The right algorithm depends on your threat model.

Quick reference

MD5 — legacy checksums only; not for security
SHA-1 — deprecated for certificates; avoid for new designs
SHA-256 — general-purpose secure hash for integrity checks

Passwords are different

Never hash passwords with bare SHA-256. Use adaptive algorithms with per-user salt.

Generate digests locally using the Hash Generator.

Try it in Zovaty Tools

hash generator

Frequently asked questions

Can I use MD5 for passwords?

No. Use bcrypt, scrypt, or Argon2 for password storage. MD5 is not collision-resistant for security use.

JWT Security Basics Every Developer Should Know

Claims, expiration, signature verification, and common JWT mistakes in production apps.

1 min read

How to Create and Store Strong Passwords

Entropy, password managers, and why local generation matters for privacy.

1 min read

Why Client-Side Tools Protect Your Data

How in-browser processing keeps secrets off third-party servers — and when it is not enough.

1 min read

Hash functions: checksum vs security

Quick reference

Passwords are different

Try it in Zovaty Tools

Frequently asked questions

Can I use MD5 for passwords?

Related posts

JWT Security Basics Every Developer Should Know

How to Create and Store Strong Passwords

Why Client-Side Tools Protect Your Data

Hash functions: checksum vs security

Quick reference

Passwords are different

Try it in Zovaty Tools

Frequently asked questions

Can I use MD5 for passwords?

Related posts

JWT Security Basics Every Developer Should Know

How to Create and Store Strong Passwords

Why Client-Side Tools Protect Your Data