[gzer0]

The only information Signal can provide is [1]:

  * Time of account creation 
  * Date of the account’s last connection to Signal servers. 

That is all. If you want, the link below is the grand jury subpoena for Signal user data, Central District of California, in full.

[1] https://signal.org/bigbrother/cd-california-grand-jury/

[globalise83]

That's my point, if Signal were a CIA front with some kind of secret backdoor, it would probably not reveal that in response to a request from a Central District of California grand jury.