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Arcus

This project contains the source code of the Thunderbird add-on Arcus.

It's a Rust-based encryption and decryption tool integrated into the email client, powered by Rust, https://github.com/str4d/rage and WebAssembly.

See: addons.thunderbird.net/en-GB/thunderbird/addon/arcus/

Thunderbird

What you can do:

  • Set your secret key and automatically decrypt emails
  • Generate a new key pair and download it to a file
  • Encrypt plain text in emails for a list of recipients. The addon reads the "To"-field and tries to fetch public keys for these contacts (stored in the "Custom4" field in the address book).

Permissions

This addon uses a long list of permissions, because each is needed for small things. Of course, nothing unexpected is done with your mails or account!

  • compose: Replace plain text with encrypted text
  • storage: Store your own secret key for automatic decryption
  • messagesRead: Read incoming mails and decrypt existing age blocks
  • messagesModify: Replace the cipher text with plaintext (only changed in display, the original email itself is never modified)
  • tabs: Open and query tabs and their content
  • addressBooks: Fetch a public age key from your contact, if stored in field "Custom4"
  • accountsRead: Read info about the current account
  • browserSettings: Compatibility with some functions

License

Copyright 2023 Dominik Pataky

Licensed under the MIT license.