Whats the current thinking on the security level of 900Mhz digital spread sectrum cordless phones? Clearly it's not a basic scanner job but how much more equipment is needed to monitor one ?

Well when you listen into a spread spectrum conversation what you will hear is open squelch white noise. The spread spectrum radios that I know about send information on several deffrent frequencies throughout the conversation. Unless you have a system to receive the encoding bit that signal what frequency is next you can't easily find the next freqency before it changes again. This change happens several time a second. The information is "packet-like", that is why you are able to use so many spread spectrum units at once. Example, Lynx spread spectrum T1 information signal (data) is combined with a high rate spreading code (chip sequence). A multiplier performs the combination. Because the spreading code is pseudo-randomly generated, the combined signal occupies a significantly expanded bandwidth with a lower uniform power density. At the receiver, a locally generated, synchronized replica of the spreading code recovers the information signal, through a second multiplication. The same code sequence must be used in the transmitter and receiver to avoic losing the information. The coding is direct sequence, 16 x spreading rate, the number of codes is a 9 DIP switch selectable. Intresting is taht the radio acquisition time is 500 msec, typical. If this a security hole I don't know. Note this is typical of a Spread Spectrum Microwave radio, a lot of the same applies to 900MHz T1 and cordless phones. As soon as I have further info on encryption of signal/Freq. destination I'll post it. Dr0id ( Computer Consulting & Management ) (P.O. Box 421 Cambria, IL 62915-0421) -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.2 mQENAzCsIi4AAAEH/1hb5+tO/n99Nbppf0ImLJ6AaVZ3NlZP0ZHwRQor00uA129i d4zWixNXxc8t2auaqN+asV99LpIip3/nQzBnjydiumeBdGLF2PR9+6X8X/RrqKa1 dVIukxM5Agg2eM6ih+0J38hgKJ3qzKXSz6sjYmpaxvbXZoHHOLUk/ZtHUKvvEyPw hnJEYnut8NUnIeK56lqeqRw86yoeRKymbfCdjdpgeY2aRwK2FJts8sbb7Fs10s4y jgxWIxIipBznbGUTh1hb2XrLGPENwk3E/qqXQJEsrySbtwdl6VgTVQjhDDEJMitL DYeiQ3W5EgxfcdbM1j2FwYu3P/dM6Y0I8xLMYT0ABRG0NmFuZHIwaWRAb2ljdTgx Mi5jb20gKG9pY3U4MTIuY29tIHN5c3RlbSBhZG1pbmlzdHJhdG9yKYkBFQMFEDCs LO90C7R/GkJcSQEB01cH/0KC3sd+u4OxMku5378SJktoN6QIQYLJ7uVbuV4S51yK NAotCGf4Wl6wwjynzZvXKU0H87oDuMiq7FybgMNL2n+4bQIZi0iz0lIuzwoMDu63 NrHUW9Kz42pOnhrEhrdkHhHL9O5GgD1yc40fJ3qw5h7LQEjDxgypyw0IFILFc34u LeRLliNibxKp8JwAxXNHWSgxu28TQvmnkHi0AHP6tJ/uZYe+4dqJtrMMsYFjzZaz DPmxD+dzbTwlQKtJaP1ZkDI0Sr072wrZDv+G86GyGBMX2lpSafpRitnxuUttjU9o wsQ9Qo5xiH1nZRCs/bDzJe/gng+GHzevixDIITurtNA= =SgPT -----END PGP PUBLIC KEY BLOCK-----