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Not telco, so I hope there will be better answers. Phone numbers are basically identical to IP numbers in their use, and they are declared by the emitting part
by makeitdouble 5y ago
Not telco, so I hope there will be better answers.
Phone numbers are basically identical to IP numbers in their use, and they are declared by the emitting party. Just as you can spoof IPs in the packet headers, you can spoof the telephone number at the tranport level.
We could upgrade to more secure connections, but the whole point of using the telephone network is because of the legacy. I can't imagine a telco putting significant money into improving the network when no customer will pay more for that (right now arguably, spammers are their first class customers ).
- josephcsible 5y agoBut for IPs, don't we at least have reverse path filtering available?
- jimktrains2 5y agothat doesnct work for publicly available services and the initial routwr passes the traffic. This is how things like dbs and ntp amplification attacks work: you spoof your origin ip and have the server generate traffic to the targwt/spoofed ip address.
- thedufer 5y agoThe big difference is that if you send a packet with a spoofed source IP, the reply won't get to you. The phone system allows you to set up a full two-way channel without the receiving party ever needing the correct identifier for the caller.