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Signal

Owned by Signal Technology Foundation

  • Open Source
  • Free
  • Messaging

Cross-platform centralized encrypted messaging service, developed by a non-profit organization.

Secure your account (self-configuration)

Security settings

Add/change PIN Via app-only
  1. Tap on your profile in the top left
  2. Go to Account
  3. Select Change PIN
Verify Linked Devices Via app-only
  1. Tap on your profile in the top left
  2. Go to Linked Devices
  3. Verify that you know these devices, delete those you do not know or need anymore

Privacy settings

Revoke access to address book (contacts) Via app-only
  1. Go to your device settings and look for Signal
  2. Un-toggle Signal's access to your Contacts

What they collect [source]

Your phone number

When registering, you are unable to sign up for Signal without a phone number.

Your contacts (optional)

If you share your address book you will be able to see who in your address book is on Signal. This data is transmitted cryptographically to their servers.

Last updated: 2021-05-16