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  1. VERNAM

    vernam.app

    Free, open-source, fully client-side file encryption. Drop a file, set a passphrase, done, or open a .vrn file someone sent you. Nothing is ever uploaded. XChaCha20-Poly1305 + Argon2id. By PrivacyTools.io.

Practical guides

Does VERNAM Upload Your Files or Require an Account?
No. VERNAM encrypts and decrypts files entirely inside your browser, so your file and passphrase never reach a server, and no account is needed. The …
What Does VERNAM’s High Security Mode Change?
VERNAM’s high security mode makes key derivation heavier: it uses Argon2id with 256 MiB of memory and 3 passes instead of the standard setting. That …
How Strong Is VERNAM’s Passphrase Generator?
VERNAM’s built-in generator draws six random words from the 2,048-word BIP39 list, producing roughly 66 bits of entropy. That is strong enough to res…
How VERNAM Encrypts a File in Your Browser
VERNAM encrypts a file entirely inside your browser: you drop a file, set or generate a passphrase, and the page derives a 256-bit key with Argon2id,…
What Is VERNAM and What Does It Do?
VERNAM (vernam.app) is a free, open-source file encryption tool that runs entirely in your browser. You drop in a file, set a passphrase, and get an …