[ Thanks to An Anonymous Reader for
this link. ]
“In 2009, some weaknesses were identified when AES was used to
encrypt data under four keys that are related in a way controlled
by an attacker; while this attack was interesting from a
mathematical point of view, the attack is not relevant in any
application scenario.“The new attack applies to all versions of AES even if it used
with a single key. The attack shows that finding the key of AES is
four times easier than previously believed; in other words, AES-128
is more like AES-126.”