Comments by "Lepi Doptera" (@lepidoptera9337) on "TETRA Vulnerability (TETRA:BURST) - Computerphile" video.

  1. An NDA is a legal document that defines a "reasonableness" standard for the safekeeping of trade secrets. It prevents both sides from bringing nonsense lawsuits. If you are ever exposed to somebody's trade secret without having a written NDA in place, be very careful. It might backfire if you are dealing with a possessive personality. With an NDA all you have to do is to keep their trade secrets as safe as you would your own, i.e. they can't require you to pay damages for accidental leaks if you abide by the low standards of the document, which are usually trivial. If you are used to keeping your own trade secrets in a file folder in a locked office and you have employment agreements that require your employees to keep their knowledge about your company and its operations to themselves, then you are done implementing security measures for your partner as well. They can't sue you for not keeping their documents in a safe inside a vault inside a military installation with double fences and armed guard towers. ;-)
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  2. The mere idea that security exists in this space is a ridiculous misunderstanding of physics. A radio transmitter can always be located simply by the fact that it has to produce an energy flow that is above the noise background of the environment. No matter the protocol, it is always possible to detect the source of the transmission. For a criminal the detection of a police transmitter close to his physical location would usually be enough to seize the criminal activity. It is complete overkill to differentiate between "harmful" and "harmless" police presence for most such activities. That's why the police usually does not care about being listened to.
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  3. Curiously, it's the most secure thing you can do, if you use one time pad ciphers. And honestly... why would you use anything else in a day and age of 4Tbyte SSD drives? One drive is enough for years of voice communications. ;-)
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  4. I don't understand the point you are making here... proprietary technology (copyrighted, trademarked, patented or even just kept as a trade secret) is just like a "top secret" marker on government files: it's a declaration of legal ownership. It's not a matter of security. Stamping "Top Secret" on a document doesn't make it safer. It does, however, guarantee that the government can prosecute unlawful use.
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  5. That's guaranteed by the law and only by the law. If you think that spying on the police will keep you safe from the police of a country that does not abide by human rights standards, then you are just kidding yourself... and not just a little.
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