RSA was hacked in March. This was one of the biggest hacks in history.
The current theory is that a nation-state wanted to break in to Lockheed-Martin and Northrop-Grumman to steal military secrets. They couldn't do it, since these companies were using RSA SecurID tokens for network authentication. So, the hackers broke into RSA with a targeted email attack. They planted a backdoor and eventually were able to gain access to SecurID information that enabled them to go back to their original targets and succesfully break into there. In the aftermath of the attack, RSA was forced to replace SecurID tokens for their customers around the world.
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