3 ms·
This is an interesting project and I've played with it in the past. Note, however, you should not use this for any real purpose. I saw a video on Youtube a whi
by jlgaddis 9y ago
This is an interesting project and I've played with it in the past.
Note, however, you should not use this for any real purpose. I saw a video on Youtube a while back of the author presenting this (at a LUG meeting or some such) and even he warns against using it for any real purpose.
So play around with it, hack on it, etc., but do not, by any means, incorporate this into any process that requires actual entropy for cryptographic purposes.
- SlowBro 9y agoWhy not?
- IntelMiner 9y agoSpeculation: A digital TV signal is a lot more repeatable than an analog one. A digital signal doesn't have the "TV static" effect of an analog signal that may introduce different entropy between two devices pulling the same signal in different locations
- jamesmcnalley 9y agoI'm not sure I agree that a digital TV signal has more repetition than analog. It is possible, but worth investigating. That said, although the DVB-T dongles were intended for digital TV use, the typical demodulators (such as http://www.amateur-radio-wiki.net/index.php?title=RTL2832 http://www.amateur-radio-wiki.net/index.php?title=RTL2832) have an extremely wide frequency range and can be repurposed all over that range. Absolutely use extreme caution when adopting a new source of entropy.
- ce4 9y agoPlease note that the rtl-sdr dongle is used as a generic software defined radio receiver, it can be tuned to any frequency range it supports. It has a few issues like the usb packaging does some retiming, plus the rtl chip documentation is under nda and else.