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About sharing image copyrightiStock The clash between Apple and the FBI over whether the company should provide access to encrypted data on a locked iPhone used by one of the San Bernardino attackers highlights debates about privacy and data security which have raged for decades. Cryptography was once controlled by the state and deployed only for military and diplomatic ends.
But in the s, cryptographer Whitfield Diffie devised a system which took encryption keys away from the state and marked the start of the so-called "Crypto Wars".
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Whitfield Diffie: The revolution begins Incryptographer Whitfield Diffie devised "public key cryptography", which revolutionised encryption. Not ordinary integer arithmetic, but something like clock arithmetic - it's 11 o'clock and you wait three hours and you get 2 o'clock - and table lookups.
What's the 5th element in the table? What's the 20th element?
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Morre human being can't do enough of those calculations to produce a secure system without making too many mistakes. If you look at the US Department of Defense, it's very large, but very centralised; everybody knows the chain of command.
If you were in the military, and it nxa part of your asment to talk to somebody securely in another part of the military, they would supply you with a key, and every morning you come out and put one in your teletype machine or phone or whatever. Until you have public key cryptography you have no way of arranging the keys on demand at a moment's notice for these secure communications.
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Amazon, eBay, all of the merchants on the internet encrypt at least some of the traffic you have with them, at the very least the payment portion of it. Suddenly somebody was treading on its turf, and it made several attempts to tonightt its market. That's what made it so powerful and so wonderful. They didn't want a competitor developing algorithms that maybe they would have trouble breaking into.
They wanted to hold the keys to the kingdom. But it was settled fairly amicably, fairly quickly.
The next problem was who would control the development of cryptography standards for the US government. The National Bureau of Standards had been doing this in the s but in the s the NSA began pushing in this direction.
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They exercised tremendous control, and kept blocking standards that were more friendly to the commercial sector. That battle went on between until the mid s. It was quite ugly.
Clipper was a very hard algorithm with a secure key, but the key was split and was to be shared with agencies of the federal government. The idea was [that] a business person travelling overseas would be able to use a clipper-enabled phone and talk securely with the office back at home. Outside the US, no one wanted it. Inside the US, no one bought it.
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It was a total failure. If you wanted to export a computer toniht communications device with cryptography, you needed an export licence from the US government. The effect was to not have strong encryption domestically as well as abroad.
You'd need to know lioking that was a prelude to war, or just an exercise. One of the ways to do that was by analysing the als and communications traffic going around on the other side. ly they'd had the ability to decrypt things that were weakly encrypted.
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You tomight throw a super computer at the problem and try all the possible keys until you unlock the message. But also, the forms of encryption were becoming stronger. The encryption that was being used by governments themselves back in the s was called the Data Encryption Standard.
With a modern PC, you can break morr in a matter of seconds. That kind of evolution in encryption and decryption has been going on ever since.
There's a thing called the Tor network which causes security agencies a great deal of trouble, because you don't even know where that person is based, never mind who they're communicating with. It's out there. So what you have to do is be able to get at it before it is encrypted or after it's decrypted.
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They were the ones running it; it was no longer governments and state telecommunications companies. It's a forensic tool that allows you to analyse Windows systems. With messaging services it was possible for governments with the right authorisation to go along and sit in the middle of the conversation and look at the messages in a non-encrypted form.
I do believe that. I see mofe arguments Naked vagina Wenatchee Washington both sides. I see the fact that the FBI wants access to this information, and I also see Apple's need to protect its customers' privacy.
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What I would say is I like that this fight is happening in public so that we can have debates like this. Listen online or download the podcast. Related Topics.