High strength end-to-end encryption with perfect forward secrecy for your favorite email, plus real-time secure chat

Latest Version

Version
1.2.13
Update
March 23, 2023
Size
135KiB
Developer
passlok.com
Category
Users
29
Rating
3 ★
Manifest Version
3
Web Store Status
Languages Support
English (United States)
See more
Permissions
Storage
See more

SeeOnce Privacy Extension

SeeOnce encrypts your email messages so they self-destruct after the recipient has read them. It does this without involving any servers or forcing you to make an account anywhere. You can keep using your preferred email.

All other apps and extensions store your private content somewhere. SeeOnce does not do this; instead, it achieves forward secrecy by changing encryption keys with every message. This way, you don't have to trust anybody.

When you get a locked message, just paste it into the extension and it will open automatically. Then you can reply directly from within the extension.

Your friends don't need to have this extension. Messages open in a webpage just by clicking them. They can do this on an Android smartphone if necessary.

Some people live in places where using encryption is itself compromising. This is why the extension can disguise its output so it looks like normal text. Just supply a sufficiently long cover text after the message is locked. Disguised messages also unlock as soon as you paste them in.

If you find yourself exchanging a lot of emails, SeeOnce allows you to switch to real-time chat, which can involve text, files, audio, or even video. Just click the Chat button to make a secure invitation that only your correspondent can open, and then only once.

Comprehensive help is just one click away.

The extension uses 255-bit standard elliptic curves, which have been vetted against weaknesses by experts. On top of that, it uses 256-bit XSalsa20 encryption and 512-bit hash functions to complete the locking process. XSalsa20 is a high-performance, open source cipher, which has been scrutinized by experts for nearly a decade without any practical weaknesses being found.

This is the Chrome extension version of SeeOnce, essentially identical to the web version, except that it syncs its data seamlessly between machines.

The following is to check the authenticity of the web version:

Current version is: 1.2.12
Main source: https://PassLok.com/SeeOnce
Read more

Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "SeeOnce Privacy", "short_name": "SeeOnce", "description": "High strength end-to-end encryption with perfect forward secrecy for your favorite email, plus real-time secure chat", "version": "1.2.13", "manifest_version": 3, "icons": { "16": "seeonce-icon16.png", "48": "seeonce-icon48.png", "128": "seeonce-icon128.png" }, "content_security_policy": { "extension_pages": "default-src 'self'; img-src 'self' data:; style-src 'self'" }, "permissions": [ "storage" ], "background": { "service_worker": "background.js" }, "action": { "default_icon": { "16": "seeonce-icon16gray.png", "48": "seeonce-icon48gray.png" }, "default_title": "SeeOnce Privacy" }}
Read more

Similar Extensions

icon

hiper.cards - bookmarker, highlighter, tab manager Extension · Productivity 29 1 ★ 1.99MiB

icon

PassLok Privacy Extension · Productivity 29 13 ★ 265KiB

icon

SynthPass Extension · Productivity 29 1 ★ 94.65KiB

icon

Doublespeak Extension · Social & Communication 29 0 ★ 32.18KiB

icon

PassLok Universal Extension · Productivity 29 0 ★ 224KiB

icon

URSA Privacy Extension · Productivity 29 0 ★ 154KiB

icon

Numici - annotate, collaborate and synthesize Extension · Productivity 29 3 ★ 6.46MiB

icon

reddit-uhd Extension · Fun 29 4 ★ 308KiB

icon

Keyboard Privacy Extension · Developer Tools 29 23 ★ 63.53KiB

icon

Certified Messages Extension · Social & Communication 29 35 ★ 35.82KiB

icon

20Q Text Converter with AI Extension · Productivity 29 11 ★ 1.03MiB

icon

FusionKey Extension · Productivity 29 0 ★ 264KiB

icon

KodaMail Extension · Social & Communication 29 1 ★ 980KiB

icon

What's True Online? Extension · News & Weather 29 0 ★ 42.34KiB

icon

PassLok for Email Extension · Productivity 29 2 ★ 202KiB

icon

secretchat.site Extension · Social & Communication 29 2 ★ 379KiB

icon

Digify for Gmail: Encrypt, track, and unsend Extension · Productivity 29 22 ★ 5.57MiB

icon

Message Secure Send Extension · Productivity 29 0 ★ 87.51KiB

icon

AdAnalyst Extension · Social & Communication 29 6 ★ 1.2MiB

icon

PrivatizeMe Extension · Accessibility 29 5 ★ 85.13KiB

icon

E-mail Encryptor for GMail Extension · Productivity 29 4 ★ 287KiB

icon

AIN Wallet Extension · Developer Tools 29 5 ★ 1.91MiB

icon

Foragear- Quick Search Tool Extension · Productivity 29 5 ★ 19.31KiB