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Encryption

3 ZeroUtil articles cover encryption, published between April 2026 and May 2026. Each one is written to explain the mechanism rather than list steps, and links to the free browser tools that do the job.

These articles sit alongside the security & privacy toolset.

Article title card. Two pairs of boxes, the upper joined by a single amber arrow and the lower by arrows in both directions, with the line: one of these has no way back
Security & Privacy

Hashing vs Encryption vs Encoding: The Three Things People Keep Confusing

Three transformations that all produce gibberish and solve different problems, with the measured cost of picking the wrong one for passwords.

Article title card. Two rows of cipher blocks on a dark grid, the lower row ending in an amber block labelled tag, with the line: one mode authenticates, one does not
Security & Privacy

AES-GCM vs AES-CBC: Which Mode to Use and Why

What block cipher modes do, why GCM replaced CBC for new code, what nonce reuse actually leaks, and the NIST limits that make it a requirement rather than advice.

Article title card. A shield with its right half filled in amber, with the line: what leaves the machine, and when
Security & Privacy Guide

The Online Privacy Guide: Practical Threat Models for Browser-Based Work in 2026

Threat models worth naming, the thirty-second check that beats any privacy policy, and an honest list of which of our own tools upload your file.

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