Help, I think my ThinkPad has an NSA implant! The display is encrypting part of the image! In ECB mode.pic.twitter.com/1Gmo7doUiO
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It's still legible because the same 8- or 16-byte block is encrypted the same way, so any time you have clean patterns in the image, you get clean patterns in the encrypted version. ECB mode is just a substitution cipher, and substitution ciphers are no good.
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Now consider how Zoom was using it for encryption until this week.
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