Signal is probably the easiest way for most people to communicate with a very low risk of mass surveillance, and some resistance to targeted surveillance. There are certainly other options for encrypted messaging. Matrix can be self-hosted. SimpleX requires no registration. Both are a more challenging UX for people without a tech background.
From context, however, this is not a problem with Signal’s security, but an informant in the group likely gave the FBI access to the messages.
It depends.
Signal is probably the easiest way for most people to communicate with a very low risk of mass surveillance, and some resistance to targeted surveillance. There are certainly other options for encrypted messaging. Matrix can be self-hosted. SimpleX requires no registration. Both are a more challenging UX for people without a tech background.
From context, however, this is not a problem with Signal’s security, but an informant in the group likely gave the FBI access to the messages.