High strength symmetric encryption for your favorite email, plus real-time secure chat
URSA Privacy Extension
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.
URSA is fully compatible with PassLok Privacy, its larger sibling, also in this Web store. PassLok adds several asymmetric encryption modes, as well as secret splitting and digital signatures. There is also a web app at https://passlok.com/ursa
You can check the integrity of the web version of URSA with this data:
Current version of URSA is: 4.3
SHA256 of the single-file version, which can be downloaded from the above link:
62ac-893d-a6df-edfc-dbd9-a849-5404-5b13-6701-d0da-87c2-8d0b-bc44-5153-742b-96b0
See the developer reading this on video: https://www.youtube.com/watch?v=nzTyfvgrHgc
Source Manifest.json
Similar Extensions
Doublespeak 11 0 ★ 32.18KiB
PassLok Universal 11 0 ★ 224KiB
FusionKey 11 0 ★ 264KiB
SeeOnce Privacy 11 1 ★ 135KiB
Anti Rebind 11 0 ★ 52.75KiB
PassLok Privacy 11 13 ★ 265KiB
EnshieldMe 11 2 ★ 621KiB
SynthPass 11 1 ★ 94.65KiB
Secure Google Chat 11 0 ★ 152KiB
popupCrypt 11 2 ★ 22.66KiB
BrGP for Chrome 11 2 ★ 301KiB
Inline PGP 11 3 ★ 3.48MiB
Grd Me 11 1 ★ 1.07MiB
PassLok for Email 11 2 ★ 202KiB
Keen Debugger 11 0 ★ 12.25KiB
AnyCrypt 11 2 ★ 1.13MiB
console.sparkline 11 1 ★ 4.7KiB
OctoLenses 11 3 ★ 3.74MiB
Encrypted Messenger 11 2 ★ 20.93KiB
AE Encrypt 11 5 ★ 56.53KiB
GitHub Enhancement Suite 11 1 ★ 56.24KiB
Libraries.io | GitHub Companion 11 3 ★ 1.31MiB
secretchat.site 11 2 ★ 379KiB
File Guard (Encryptor | Decryptor) 11 2 ★ 26.96KiB