Ben Innes, 26, is shown beside Seifedeen Mustafa who was wearing what he claimed was an explosive vest.
The health and safety auditor is understood to have been one of the last three hostages to leave the plane before Mustafa surrendered to police, the Aberdeen Evening Express reported.
Mustafa had forced the aircraft with 56 passengers on board to divert to Cyprus during a domestic flight from Alexandria to Cairo.
Mr Innes’ mother said she is keen to get her son back home.
Pauline Innes, from Leeds, said: “We don’t really want to comment on what has happened until he’s home and we know he’s safe and well.
“Obviously he’s not come home yet and there are security issues to think about - we don’t want to talk about anything until it has all been resolved.
“All we can say is the picture is clearly not a selfie as everyone has been describing it.
“You can clearly see it is not Ben who is taking the picture.
“He’s in it but he’s not taking it.
“But we don’t want to speak about anything until he’s back home.”