Re: [cryptography] [Cryptography] Help investigate cell phone snooping by police nationwide
On Sat, Jun 7, 2014 at 11:45 PM, Sidney Markowitz sid...@sidney.com wrote: I don't know what would make me feel safer - putting the phones in a microwave oven with the chance that the door could easily be left ajar, or getting the acoustic insulation and masking hum of a refrigerator. Trust the microwave you tested, right, because you do not know what quality DSP is pricessing your remaining 5dB audio over your entire conversation. Or put microwave in fridge ;) aka: remove battery / crush/displace phone... be happy. ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] [Cryptography] Help investigate cell phone snooping by police nationwide
Den 8 jun 2014 21:52 skrev Jerry Leichter leich...@lrw.com: On Jun 7, 2014, at 7:56 PM, Bill Cox waywardg...@gmail.com wrote: Is there reliable evidence that putting mobiles in a fridge is any better illusory comsec than putting pillows around the door also comically exhibited to clueless journalists favored by Showman Snowden? Or at least as tall-taled by comical Glenn. It's called a Faraday cage. I'd test it right now, but I think someone hid my mobile phone in a fridge. The problem is that a refrigerator is not a Faraday cage. Every refrigerator I've ever used has rubber gasket between the door and the body of the refrigerator. It's typically 2-3 cm thick. Cell phone wavelengths vary with band, but range from somewhere around 30 cm down to around 8 cm. A refrigerator should attenuate the signal, probably quite a bit, but it's not going to block completely. Of course, this assumes that the point of the exercise is to block the RF. A refrigerator will also, to some degree, block sounds. Since nothing inside the food box of a refrigerator typically generates any noise (and of course it's not *sensitive* to noise either), there's no reason to design a refrigerator to be soundproof. So how much it will muffle outside sounds is unclear. These things are easy to check experimentally, at least to a good enough approximation to say whether they are likely to be effective for the task at hand. If it's important to you ... let us know how the experiments come out. -- Jerry That leaves my conclusion as that you should stuff the phone into pillows in the microwave before you put the microwave in the fridge, and then stuffing more pillows in there. Then you wrap it all with a lot of layers of blankets and hold them in place with aluminum foil. Then you do the same separately for the battery. Because you removed the battery first, right? Should only take a single working day or so to achieve. ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] Help investigate cell phone snooping by police nationwide
On Sat, Jun 7, 2014 at 5:02 AM, John Young j...@pipeline.com wrote: ... Is there reliable evidence that putting mobiles in a fridge is any better illusory comsec than putting pillows around the door also comically exhibited to clueless journalists favored by Showman Snowden? Or at least as tall-taled by comical Glenn. if regional any phone at hotel feed audio (speex codec of room audible speaking individuals) was enabled, without a specific scrutiny, then yes, phone is better. removing batteries a session anomaly potentially alerted upon in a different manner, leading to targeted exploitation which means you always lose. Or for that matter, Ed's laughable assurance that encryption works. as i said in another channel, defeating blanket, passive surveillance still huge win. and yes 100%, current systems in every sector of life are vulnerable to focused, skilled attackers of any stripe, GO, NGO, independent, etc. Meanwhile NYT, Guardian, WaPo, Greenwald, Poitras and a slew of accomplices continue to withhold 97% of the alleged Snowden wad to avoid harm to the nation as well as to avoid harm to the spy business of all nations. they repeatedly affirm Snowden has requested this. Snowden has repeatedly not asked for a blanket release nor a change in how the information is delivered. i am withholding further judgement until there is further information. Non-interruptous coitus of the public abounds by the comsec industry. an industry that should not exist! build security in! ;) ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
Re: [cryptography] Help investigate cell phone snooping by police nationwide
On Sun, Jun 8, 2014 at 2:47 PM, coderman coder...@gmail.com wrote: ... if regional any phone at hotel feed audio (speex codec of room audible speaking individuals) was enabled, without a specific scrutiny, then yes, phone is better. removing batteries a session anomaly potentially alerted upon in a different manner, leading to targeted exploitation which means you always lose. a clarification: putting a phone in the fridge, without airplane mode, without removing the battery, accomplishes resistance to opportunistic eavesdropping via encoded and ex-filtrated voice. targeted attacks, as mentioned, mean you always lose :) ___ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
