Hashing vs Encryption: What Is the Difference?

Learn the practical difference between hashing and encryption and why the two concepts should not be confused.

They solve different problems

Hashing and encryption are both used in security, but they are not interchangeable. Encryption is intended to protect information so authorised parties can later recover it. Hashing creates a derived fingerprint used for purposes such as verification.

Encryption is designed to be reversible with the right key

Encrypted data can be transformed back into readable form when the correct decryption process and key are available. This makes encryption useful when the original information must be recovered later.

Hashing is generally one-way

A cryptographic hash is designed so that you do not simply reverse the hash to retrieve the original input. Instead, a system can hash a candidate input and compare the result with an expected value.

Passwords need special treatment

Passwords should not simply be encrypted and stored for routine authentication. Modern systems normally use specialised password hashing methods that incorporate salts and deliberately make large-scale guessing expensive.

Base64 is neither

Base64 often causes confusion because it changes text into another representation. It is encoding, not encryption and not hashing. Anyone with the encoded data can decode it without a secret key.