On Friday, Reuters news agency reported that unknown hackers have managed to break into the networks of arms manufacturer Lockheed Martin as well as those of other US military contractors. According to the report, the intruders exploited the information about cryptography specialist RSA's SecurID products that was seized by hackers during an attack in March. It is currently unclear whether the intruders actually managed to obtain valuable information; however, the fact that all the systems attached to the network are likely to contain documentation relating to weapons systems which are currently in use, or are in development, doesn't bode well.
The US Defense Department reportedly told Reuters on Saturday that it was working with Lockheed to determine the scope of the attack. Lockheed confirmed, in a statement, that it had detected a "significant" attack on its network on 21 May and had reacted "almost immediately" to institute counter measures; it said that its "systems remain secure". The company is currently investigating the attack but is already claiming that "no customer, program or employee personal data has been compromised". It is still working to restore employee access to its network.
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