Posted on 2015-07-16 by: Axel Kloth
I am not quite sure what to think of the recent statements that the director of the Federal Bureau of Investigation (FBI), James Comey, has made. According to The Guardian, James Comey, FBI chief wants ‘backdoor access’ to encrypted communications to fight Isis. To me it looks like he is looking for a justification to first ban and later on outlaw strong encryption without backdoors. This is confirmed reading the statement right from the horses’ mouth here: Going Dark: Are Technology, Privacy, and Public Safety on a Collision Course?. Newsweek confirms this interpretation here: FBI’s Comey Calls for Making Impenetrable Devices Unlawful.
Well, I am not a fan of backdoors. I think that encryption is good and backdoors are bad. The reason for that is very simple. Strong encryption protects you and your privacy. You do not send a piece of important information on the back of a postcard – you put it into an envelope. You do not hand this envelope to Shady Tree Mail Delivery Brothers to get it to the recipient. You drop it into a mailbox of the USPS, Fedex, UPS, DHL or the like, expecting that they do not open the envelope. With the delivery contract, you have a reasonable expectation of privacy. On the Internet, there is no expectation of privacy. If you want something to be delivered such that no one in the path of the transmission from you to the recipient can read the contents, then you need to be able and have the right to use strong encryption to ensure that despite the open nature of the Internet no one can snoop. It also should be up to you to determine what is worthy of protection and what not. If I send an email to a supplier asking if they would like to do business with me, then I do not need any encryption. However, if they agree and they send me back a quote, they sure do not want their competitors to be able to intercept and evaluate their quote and possibly undercut that quote. They have a reasonable interest in protecting their quote.
Now let’s assume that we have a new law in place that allows strong encryption but requires you to accept a backdoor into your encryption with the backdoor keys being held at a government location. Why is that a bad idea? Well, for starters, the biggest focus of any hacker will be this repository of keys to the backdoors. Any hacker on the planet – good or bad, capable or incapable, ethical or not – will attack this repository. Brute force attacks and social engineering and many other attack methods or simply sheer luck will be used to get in. It is unrealistic to assume that such database can be protected, and it is naive to pretend that a mechanism providing a backdoor cannot be exploited.
If history has proven anything then we must assume that encryption with a backdoor is useless as both the backdoor mechanism itself and the centralized repository for the backdoor keys are vulnerable and will be cracked. We know that the likelihood to break into the repository of keys for the backdoors is 100%, no matter how protected this database is. With the repository of keys to the backdoors in an unknown number of unknown hands, encryption becomes useless as any crook and any unethical person has access, and the ethical and good people are being betrayed. That’s akin to putting every criminal on the streets and every law-abiding person in prison. Is that what the US government and the FBI want?