"There will be higher demands on airports around the world," says Cherfils, "and that could mean restrictions within Egyptian air space and restrictions or outright bans on flights to Egypt".
The move follows the confirmation from the Russian Federal Security Bureau that a bomb brought down the Russian jet that crashed over Egypt last month, killing all 224 people on board.
Traces of explosives were found in the plane's debris and that has led to speculations that someone with access to the Sharm el-Sheikh airport in Sinai managed to get past security there. The explosives could have been brought in inside a piece of luggage or could have been placed in the plane as bags were loaded on to it, says Cherfils.
Cherfils adds that someone who was familiar with the airport was involved in the bombing. "One can draw that conclusion," she says.
Sweden has demanded a written confirmation from Egypt on the measures taken to increase security at the country's airports. The Swedish Transport Agency hopes to get a response this week.