Contact Methods Configuration

Class Diagram#

Instantiation#

Since the contact methods include the student’s Matrix account at the university’s Matrix server, the student’s username is required to build their Matrix ID which is written in the format @username:uni-jena.de, e.g. @es13nsa:uni-jena.de.

ContactMethods contactMethods = new ContactMethods("es13nsa");
assert contactMethods.getMatrixID().isPresent();
assert contactMethods.getMatrixID().get().equals("@es13nsa:uni-jena.de");

Contact methods#

The developers offer the following contact methods:

• PASSWORD_EMAIL:
  Symmetrically encrypted the response with a password, using Tuta’s quantum-secure encryption for external recipients. Learn more
• PGP:
  Public-key encryption using OpenPGP
• TUTA:
  Use the end-to-end encrypted German e-mail provider Tuta.
• SECURE_EMAIL_PROVIDER:
  Use one of the following end-to-end encrypted e-mail providers:
  • Tuta
  • Proton
  • Mailbox
  • StartMail
  • Posteo
• MATRIX:
  Use the university’s Matrix chat server.
• THREEMA:
  Use the end-to-end encrypted messenger Threema.
• SIGNAL:
  Use the end-to-end encrypted messenger Signal. (Does not require sharing the phone number anymore.)
• SIMPLEX:
  Use the end-to-end encrypted, decentralised (but not peer-to-peer) messenger SimpleX.
• UNENCRYPTED_EMAIL:
  Send a plain-text e-mail from the user’s university e-mail address without any encryption whatsoever.

Settings#

Preferred contact method#

There are two options to choose from:

• HTTP_CLIENT:
  A resource-efficient client that does not require a browser but instead makes direct HTTP requests. Especially useful for low-power devices like a Raspberry Pi.
• HEADLESS_BROWSER:
  A browser like Firefox but without a graphical user interface. Very resource-intensive and should only be used if the hardware is capable of running a headless browser. NOT recommended for use on devices like a Raspberry Pi.

Symmetric password#

The password that shall be used for symmetrically encrypted e-mails.

OpenPGP public key#

The user’s ASCII-armored OpenPGP public key that can be used to encrypt messages to the user.

OpenPGP public key URL#

A URL pointing to the user’s OpenPGP public key that can be used to encrypt messages to the user.

Tuta address#

The e-mail address of the user’s Tuta account.

Secure e-mail provider address#

An e-mail address of the user at a secure e-mail provider.

Threema ID#

The user’s Threema ID that can be used to initiate a conversation with the user.

A Threema ID is a string of 8 alphanumeric characters (case-insensitive). Optionally, it may be in the form of a Threema ID URL, i.e. start with threema.id (possibly with the protocol and/or www.).

Signal ID#

The user’s Signal ID that can be used to initiate a conversation with the user. A Signal ID is a phone number, a Signal URL or a Signal user name.

A Signal URL is a string of 64 alphanumeric characters (case-sensitive) that starts with signal.me/#eu/ (possibly with the protocol and/or www.).

A Signal user name is a string of alphanumeric characters and underscores, followed by a dot and at least two digits, e.g. edward.13.

https://signal.me/#eu/iOiKCM7MZ9xxlA8SqLasWKsayETmvg8PakayRRXHhpL3bzpLVrdGFJingk/6mGV1

SimpleX ID#

The user’s SimpleX ID that can be used to initiate a conversation with the user.

A SimpleX ID is a URL that starts with simplex.chat/contact/ (possibly with the protocol and/or www.) and contains an .onion domain.

https://simplex.chat/contact/#/?v=1-2&smp=smp%3A%2F%2F0YuTwO05YJWS8rkjn9eLJDjQhFKvIYd8d4xG8X1blIU%3D%40smp8.simplex.im%2FsSCNS1itthj8oKaSzgrKV0xKgrbNPlFG%23%2F%3Fv%3D1-2%26dh%3DMCowBQYDK2VuAyEAlldSlwhJ1JyafXkpPnD1J65805WkVNemSpzEpYJnoCo%253D%26srv%3Dbeccx4yfxxbvyhqypaavemqurytl6hozr47wfc7uuecacjqdvwpw2xid.onion