URSA Privacy

URSA Privacy

High strength symmetric encryption for your favorite email, plus real-time secure chat

  • URSA Privacy
  • URSA Privacy
  • URSA Privacy
What is URSA Privacy?
URSA Privacy is a Firefox add-on that offers high strength symmetric encryption for text, images, and files. It allows users to encrypt and decrypt messages using a secret key. The add-on also provides the option to encrypt messages into a cover image or disguise output as normal text. Additionally, URSA Privacy supports real-time chat with various media types. It uses the XSalsa20 encryption algorithm and is compatible with PassLok Privacy.
Merlin
Stats
By: F. Ruiz
Users: 1
Version: 4.2.13 (Last updated: 2023-03-23)
Creation date: 2017-11-17
Weekly download count: NaN
Firefox on Android: No
Risk impact: Very low risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 3
Size: 162.70K
URLs: Website
Stats date:

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Summary

URSA sits near your tray bar to provide secure and easy symmetric encryption of text, images, and files. This is the process:

  1. Click the bear icon to load URSA into a new tab.
  2. Type the secret key into the top box. The recipient must know this key.
  3. Type your message, possibly containing rich formatting, images, and even files into the large box, then click Encrypt.

The recipient will decrypt the encrypted message, which can be sent by email or some other means without fear of its being decrypted, by typing the same key, pasting the encrypted message, and clicking Decrypt.

If you feel really paranoid, URSA can encrypt into a cover image, so that it cannot be detected that anything is there. The image looks the same after the secret data have been injected.

URSA can also disguise its output so it appears to be normal text.

If you find yourself exchanging frequent messages with someone, you can switch into real-time chat, which can include text, files, audio, and even video!

URSA's main encryption algorithm is XSalsa20, included within the NaCl encryption library. This algorithm has extensively been vetted by experts for over ten years without flaws being found. There are also two experimental algorithms: Pad, which uses a large piece of text (from a book, or a webpage) as key and is theoretically unbreakable, and Human, which can be performed by hand if necessary.

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Safety
Risk impact

URSA Privacy is safe to use. It does not request any sensitive permissions.

Risk likelihood

URSA Privacy is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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