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Preview of Crypto Sender

Crypto Sender by Raffaele

**Crypto Sender** is a Firefox extension that allows you to send encrypted messages securely and privately. All encryption operations are performed locally in your browser, ensuring that your messages remain confidential.

5 (2 reviews)
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About this extension
Security Hardening & NIST Compliance

• Fixed IV length to 12 bytes per NIST SP 800-38D (was user-configurable)
• Added version byte to ciphertext format for future compatibility
• Password cleared from memory after each encrypt/decrypt operation
• Removed deprecated clipboard fallback (execCommand)
• Added input validation bounds for PBKDF2 iterations
• Verified against NIST CAVP Known-Answer Test vectors (10/10 PASS)
• Manifest V3 compliance fixes
• Updated UI labels and settings descriptions

Note: Messages encrypted with v4.1 are NOT compatible with v4.2 due to the new versioned format. Please re-encrypt any stored messages after updating.
Developer comments
Crypto Sender is a Firefox extension that allows you to send encrypted messages securely and privately.
Rated 5 by 2 reviewers

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Permissions and data

Required permissions:

  • Get data from the clipboard
  • Input data to the clipboard

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Version
4.2
Size
39.14 KB
Last updated
18 days ago (Aug 15, 2026)
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