Government Spies on Signal. Signal App Cyber Security Review. Double Ratchet Encryption. Purple Team. End-to-end encryption (E2EE) is a system of communication where only the communicating users can read the messages. In principle, it prevents potential eavesdroppers – including telecom providers, Internet providers, and even the provider of the communication service – from being able to access the cryptographic keys needed to decrypt the conversation. What is my Signal Profile?
Your encrypted Signal Profile is a name and picture that you set up within the app. If you lose or switch devices, your existing profile can be recovered using your PIN. Is a Signal Profile required?
Mandatory (encrypted) names let people know who's messaging them.
First names are required. Feel free to choose a nickname, a single character, or an emoji.
Photos and last names are optional.
Keep in mind, this is what people will see when you message them if they don't have you saved to their contacts.
Profile names are required to support message requests and new upcoming features like automatic group upgrades.
How is my Signal Profile displayed?

It will be shown alongside your existing phone number when communicating with other users. Conversations will feel more personal. Group threads will be less confusing.

Who can see my Signal Profile?

It is automatically shared with

any contacts you have saved in your address book,
any people or groups in conversations you create,
any people or groups you explicitly accept,
and any groups you are added to by someone that you had previously shared your profile with.
Is sharing my Signal Profile required?

Yes, it is required to share your profile to continue conversations with any un-saved contacts to support new upcoming features like automatic group migration.

Can Signal's servers see my Signal Profile?

The Signal service does not have any knowledge of the name you have chosen or the image you have set. Your profile information is end-to-end encrypted with a unique profile key that is securely shared via the same Signal Protocol messaging channel that already protects your conversations and calls.