"Taking into consideration all possible causes behind the plane crash, including the possibility that it was targeted by a terrorist attack, the Egyptian authorities have enhanced security measures in all airports," said the interior ministry.
The plane, flown by Russian firm Kogalymavia, came down shortly after take off from resort Sharm el-Sheikh on October 31, killing all 224 people on board in Russia's worst air disaster.
The disaster prompted Britain to restrict flights to the resort, and Moscow to all Egyptian airports while barring the country's national carrier EgyptAir from Russia.
The ministry added "security sweeps" of airplanes would be conducted as well as "reviews of flight crews' security permits".
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It is not known how a bomb would have been smuggled on the doomed plane before it set off from the popular Red Sea resort, but there have been suspicions of an inside job.
The interior ministry said in a separate statement today that there have been no arrests at the airport over the incident.
"You don't need a sophisticated capability to get a small bomb, and that's all you need to bring down an aircraft, a small bomb with a straightforward timer.
"Sadly there are many, many people who can do that. The issue is about getting it air side in an airport that is supposed to be secure," said Hammond.
"Where this points the finger is at the capability of the security on the ground at Sharm el-Sheikh.