posted on Oct, 5 2011 @ 10:20 PM
Originally posted by Taz2122
He claims that encryption doesn't really work since the one (or they) who came up with the specific encryption standard would know how to decipher it
since they programmed it.
I'll give you a simple 1 bit encryption example using the "square root" function that you can show your friend.
The square of +3 is 9.
The square root of 9 is 3.
BUT
the the square of -3 is also 9.
Both negative 3 and positive 3 give the same answer = 9.
So now, imagine an encrypted file, containing one byte. This byte is "9".
The question is... what is the UNencrypted number?
So if you had to "decrypt" the number 9 to gain access to the secret files, you still have (by trial and error) to try both negative 3 and positive
3.
Sure, thats only a simple 1-bit encryption, but even though I've told you how it works, and even if you tell your friend how it works, neither of you
can still instantly solve it.
Imagine now a more complex version of this, with 128 different examples of the above "lock" for you to try.
-----------------
Note of course that this is a hideously simplistic example, but hopefully it illustrates the point that knowing how the encrption system works doesnt
just give the programmer instant access to the decrypted code.