System and method for fast and accurate detection of SMS spam numbers via monitoring grey phone space

摘要

A method and system for identifying short message service (SMS) spammers identifies senders as spammers by determining that the senders are sending SMS messages to devices included in a grey phone space. Devices in the grey phone space are identified using various methods including an analysis of call detail records. A grey ratio for a sender is determined as a ratio of messages sent to grey phone numbers by the sender to messages sent to all phone numbers by the sender. A sender is identified based on a difference between the grey ratio for the sender and a second grey ratio being above a threshold.

主权项

1. A method comprising:
receiving, by a server, a short messaging service text message associated with an originating number and a terminating number; retrieving, by the server, electronic call records associated with the originating number; comparing, by the server, the electronic call records associated with the originating number to entries in an electronic list of grey phone numbers, each grey phone number in the electronic list of grey phone numbers associated with a device lacking a telephony capability to receive short messaging service text messages; determining, by the server, a match between the electronic call records and a grey phone number in the electronic list of grey phone numbers; determining, by the server in response to the match, the originating number has previously sent a previous text message to the grey phone number known to lack the telephony capability to receive the short messaging service text messages; and identifying, by the server, the originating number as a spammer based on the previous text message previously sent to the grey phone number known to lack the telephony capability to receive the short messaging service text messages.