This message was signed with Hal’s key.. we know someone has control over his key after his death and has used it. (1) who has Hal’s key (2) where did Martin

This message was signed with Hal’s key.. we know someone has control over his key after his death and has used it. (1) who has Hal’s key (2) where did Martin “find” this message to be able to decrypt it There’s obviously some sort of agenda here involving multiple people, it’s just not clear at the moment what this particular agenda is.