alt Hacker NewsIt means you should not use it for anything important, because it can be decrypted by the public with little effort. If you look back, it has been this way for quite awhile. My gripe is with the clickbait title 'Break Me If You Can'
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tptacek • yesterday at 5:14 PM
How exactly would you decrypt a 3DES ciphertext "with little effort"?
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BREAKMEIFYOUCAN! is the default factory key programmed into every MIFARE Ultralight C chip by NXP.