Reply to post: Re: Locked out of your own data...

Zimmermann slams Cameron’s ‘absurd’ plans for crypto ban

Anonymous Coward
Anonymous Coward

Re: Locked out of your own data...

"A seemingly random block of data sent through the internet may be legitimate binary data, or if labelled as something like a jpeg, as modern art, or just about anything else. How do you actively detect and block only those data transfers which are encrypted communications?"

Actually, that's easier than you think. Any binary format has to have some kind of structure to it. That's why Linux and such can detect files by way of "Magic Numbers". Even executable programs have to be structured in some way so that the OS can load the programs into the appropriate places in memory. The two chief ones today are ELF (in the UNIX-based world) and PE (in the Windows world). Any binary blob that cannot be identified in any way is likely to be either encrypted data or actual random data (which can be the material for a one-time pad).

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