On Feb 18, 2008, at 11:07 AM, Frank W. Miller wrote: > I'm a little confused by the need to "sign" phone numbers. I mean, > whomever > uses the number makes a call to or from it right? If the receiver > of the > call doesn't want to talk to whomever calls, don't they just hang > up? This > seems like a lot of extra work for little gain.
How do they know who called? Can the thing being presented as caller- ID be trusted? Example use case: You get a call from "Memorial Hospital" at 999-454-5678. Your child was apparently injured at school and is claimed to be in ICU, but your signature is urgently needed before a life-saving procedure can be administered. You double-check by calling back 999-454-5678 and get the front desk at Memorial Hospital. Just to be sure, you look in the phone book, and yep, that's their number. Of course, you rush to the hospital. While you're out, the burglar who faked the call cleans out your house. Or even more fun: Your neighbors are having a really noisy party. Call 911, faking their phone number as the source, and report a murder-in- progress. Stand by and wait for the SWAT team to show up. -- Dean _______________________________________________ Sip mailing list http://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
