How is security enhanced by using Caller-ID over a Call-Back service or one-time-passwords for dial-up access ?
Caller-ID has one great advantage over any other mechanism for telephone lines. It allows the customer to decide *before* picking up the receiver, whether to answer the call. Consider hackers, crackers, and phreaks. Their goal in life is to forcibly penetrate electronic systems without permission (sounds like rape doesn’t it ?). They employ demon dialers and “finger hacking” to discover responsive numbers, often checking every number in a 10,000 number exchange. If they get a response such as a modem tone, they have a target and will often spend days or weeks trying every possible combination of codes to get in. With Caller-ID answer selection, the miscreant will never get to the modem tone in the first place, yet for an authorized number, the tone will appear on the second ring. Previously the best solution for dial-ups was to set the modem to answer on the sixth ring (ats0=6). Few hackers will wait that long but it can also irritate customers.
Caller-ID has one great advantage over any other mechanism for telephone lines. It allows the customer to decide *before* picking up the receiver, whether to answer the call. Consider hackers, crackers, and phreaks. Their goal in life is to forcibly penetrate electronic systems without permission (sounds like rape doesn’t it ?). They employ demon dialers and “finger hacking” to discover responsive numbers, often checking every number in a 10,000 number exchange. If they get a response such as a modem tone, they have a target and will often spend days or weeks trying every possible combination of codes to get in. With Caller-ID answer selection, the miscreant will never get to the modem tone in the first place, yet for an authorized number, the tone will appear on the second ring. Previously the best solution for dial-ups was to set the modem to answer on the sixth ring (ats0=6). Few hackers will wait that long but it can also irritate customers. • 12) What error messages will Caller-ID
