Signal is safe enough depending on your threat model
If you worry about aws centralization and outages then signal isn’t a good option
If your worried about sgx enclave exploitation then it’s not a good match
If your worried about us intelligence monitoring traffic then it’s not a good fit
So signal is fine for person to person western traffic
Not a good fit for a country needing isolated highly secure messaging… I.e. the french government should NOT use signal, centralized in America, sgx exploits are a concern, and exposing the social and communication graph to the us intelligence services isn’t in the french national interest
Signal is safe enough depending on your threat model
If you worry about aws centralization and outages then signal isn’t a good option
If your worried about sgx enclave exploitation then it’s not a good match
If your worried about us intelligence monitoring traffic then it’s not a good fit
So signal is fine for person to person western traffic
Not a good fit for a country needing isolated highly secure messaging… I.e. the french government should NOT use signal, centralized in America, sgx exploits are a concern, and exposing the social and communication graph to the us intelligence services isn’t in the french national interest
source:
If you are designing the french government communication systems, would signal work for your requirements?