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Those are not practical attacks. But your argument hinges on their being non-theoretical attacks on 3DES. Are there others you were thinking of?


3DES might have been a bad example.

My point is that even if today some sizes and lengths seem only of theoretical concern, tomorrow there might be a vulnerability, a new approach to the problem, or even natural technological evolution that might turn it into a practical attack (even when it seems impossible today)


But that's true of every cryptographic primitive. You can't make reasoned decisions based on that logic.




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