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September 2013

75 participants
292 discussions

Who bought off Zimmermann?
by StealthMonger 01 Sep '13

01 Sep '13

How ironic and sad it is that Phil Zimmermann, the author of PGP, has become so imbued with the enterprise culture that he's now so blind to the original peer-to-peer spirit of PGP that he would say things like There is no way to do encrypted e-mail where the content is protected. [1] This is simply false. If sender and receiver exchange keys out-of-band and nobody else knows the keys, the content can have cryptographically strong protection. Why would Zimmermann allow himself to be bought off? What kind of pressure is being brought to bear? Is this protracted world-class human engineering in action? [1] http://www.forbes.com/sites/parmyolson/2013/08/09/e-mails-big-privacy-probl… -- -- StealthMonger <StealthMonger(a)nym.mixmin.net> Long, random latency is part of the price of Internet anonymity. anonget: Is this anonymous browsing, or what? http://groups.google.ws/group/alt.privacy.anon-server/msg/073f34abb668df33?… stealthmail: Hide whether you're doing email, or when, or with whom. mailto:stealthsuite@nym.mixmin.net?subject=send%20index.html Key: mailto:stealthsuite@nym.mixmin.net?subject=send%20stealthmonger-key

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So I discovered that my HP laptop leaks/transmits its built-in mic audio somewhere around 24Mhz
by Eugen Leitl 01 Sep '13

01 Sep '13

http://www.reddit.com/r/RTLSDR/comments/1le3if/so_i_discovered_that_my_hp_l… So I discovered that my HP laptop leaks/transmits its built-in mic audio somewhere around 24Mhz (self.RTLSDR) submitted 23 hours ago by cronek I accidentally stumbled upon a signal in the 24MHz range, appearing to be 4 carriers. I tuned to it and heard silence, then someone came into my office and started talking and I could hear them speak. The signal appeared to be coming from my other laptop (not the one running the SDR) and was pretty weak (my antenna, the crappy one that comes with the dongle, stuck to a metal stapler was right next to the HP laptop). Here's a picture Both mics transmit independently, in the picture I rubbed one mic. The signal appears to be mirrored. When I tap the microphone, or make a loud noise that would clip the preamp, the signal drifts off and then slowly comes back to its original frequency, as illustrated here (only one of the two mics drifted, if I hit it harder or clip both mics, both will drift). I'm pretty sure that if I build a nice high-gain antenna optimized for 24Mhz I would be able to pick up the sound from some distance away. The laptop is an EliteBook 8460p. I have checked identical laptops and they do not transmit at this frequency. I didn't have the time to scan the full spectrum though. I'm guessing the preamp is really crappy and somehow ends up transmitting FM at HF freqs. Anyone has any ideas about this? I work in a high security setting and having laptops transmitting audio from everyone's office/meeting room etc is a really big deal. I somewhat doubt it to be an intentional listening device due to the weird frequency drifting. For now I guess I'll just disconnect the mic preamp pcb.

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