The problem for Al Queada is the extra code the CIA slipped into their version.
Not a problem if AQ programmed it themselves, which has been the point of my posts: the algorithms are not that hard. I teach them to undergrad math, engineering, and CS majors about once every three years. You don’t think AQ has been able to radicalize a few Muslim CS majors? (None from my classes—I’ve not had any Muslim students in them,.)
I wonder if anyone in the NSA is still around to remember this trick. They could disassemble it , place the Trojan in, then reassemble and post it again on the Internet. Nothing is safe electronically. I wonder what FIASA (?) would say about this ? If the program is used for illegal purposes (keys must be registered) , then it should be no problem.