Re: cellphones as room bugs

2006-12-04 Thread Steven M. Bellovin
On Sun, 3 Dec 2006 20:26:07 -0500 Thor Lancelot Simon [EMAIL PROTECTED] wrote: On Sat, Dec 02, 2006 at 05:15:02PM -0500, John Ioannidis wrote: On Sat, Dec 02, 2006 at 10:21:57AM -0500, Perry E. Metzger wrote: Quoting: The FBI appears to have begun using a novel form of

Re: cellphones as room bugs

2006-12-04 Thread Alex Alten
At 10:21 AM 12/2/2006 -0500, Perry E. Metzger wrote: Quoting: The FBI appears to have begun using a novel form of electronic surveillance in criminal investigations: remotely activating a mobile phone's microphone and using it to eavesdrop on nearby conversations. The

Re: cellphones as room bugs

2006-12-04 Thread Peter Gutmann
Thor Lancelot Simon [EMAIL PROTECTED] writes: It's been a while since I built ISDN equipment but I do not think this is correct: can you show me how, exactly, one uses Q.931 to instruct the other endpoint to go off-hook? You make use of the undocumented remote management interface [0]. Peter.

Re: cellphones as room bugs

2006-12-04 Thread Taral
On 12/3/06, Thor Lancelot Simon [EMAIL PROTECTED] wrote: It's been a while since I built ISDN equipment but I do not think this is correct: can you show me how, exactly, one uses Q.931 to instruct the other endpoint to go off-hook? That's the same question I have. I don't remember seeing

Re: cellphones as room bugs

2006-12-04 Thread John Ioannidis
On Sun, Dec 03, 2006 at 09:26:15PM -0600, Taral wrote: That's the same question I have. I don't remember seeing anything in the GSM standard that would allow this either. I'll hazard a guess: mobile providers can send a special type of message (not sure if it would be classed as an SMS) with

Re: Can you keep a secret? This encrypted drive can...

2006-12-04 Thread Marcos el Ruptor
Compared to AES-128, AES-256 is 140% of the rounds to encrypt 200% as much data. So when implemented in hardware, AES-256 is substantially faster. Excuse me, AES-256 has the same block size as AES-128, that is 128 bits. It's in fact slower, not faster, and in hardware it also occupies a

Re: Can you keep a secret? This encrypted drive can...

2006-12-04 Thread Alexander Klimov
On Sun, 3 Dec 2006, David Johnston wrote: Moreover, AES-256 is 20-ish percent slower than AES-128. Compared to AES-128, AES-256 is 140% of the rounds to encrypt 200% as much data. So when implemented in hardware, AES-256 is substantially faster. AES-256 means AES with 128-bit block and

Re: [-SPAM-] Re: Can you keep a secret? This encrypted drive can...

2006-12-04 Thread Brian Gladman
David Johnston wrote: Jon Callas wrote: Moreover, AES-256 is 20-ish percent slower than AES-128. Compared to AES-128, AES-256 is 140% of the rounds to encrypt 200% as much data. So when implemented in hardware, AES-256 is substantially faster. AES-256 does not encrypt any more data per

Re: Can you keep a secret? This encrypted drive can...

2006-12-04 Thread David Johnston
Leichter, Jerry wrote: | Jon Callas wrote: | | | Moreover, AES-256 is 20-ish percent slower than AES-128. | Compared to AES-128, AES-256 is 140% of the rounds to encrypt 200% as much | data. AES-256 has a 256-bit key but exactly the same 128-bit block as AES-128 (and AES-192, for that