As far as i know they use autocrypt Which I think includes pgp. Maybe its the dependency on pgp but basically there is work on autocrypt to Support pfs.
BTW until quite recently Signal didnt have pfs either although its hailed as one of the pinnacles of private and secure messaging
As far as i know they use autocrypt Which I think includes pgp. Maybe its the dependency on pgp but basically there is work on autocrypt to Support pfs.
BTW until quite recently Signal didnt have pfs either although its hailed as one of the pinnacles of private and secure messaging
Signal has had proper PFS for a long while - since 2013 or so. The double ratchet algorithm was a huge deal!