SMS, or text spam is a growing problem. We all receive messages encouraging us to enter the competition, to register for free pornography or pursue a legal claim for injuries. Most people assume that somehow his name got into the hands of spammers somehow. However, in practice, most of these SPAM messages completely nasumičnih.Spameri simply send thousands of messages in the hope that some of them put it.
How can I afford to do it? It is possible for them, because in most cases, they are paying very little for the messages that are sent. Most spam comes from SS7 spoofing fraud. This happens when the identity of roaming subscribers "acquired" false and used to send multiple messages. Usually the identity acquires a rogue engineer for the operator with access to SS7 network. He can harvest the identity of foreign subscribers roaming on the network, and then use these identities in order to inject the message back to the network. Usually an engineer will be the ability to market to their contacts within the organized crime that it will pay to send messages.
This could be a big problem for the operator to forge a roamer pripada.Broj messages can be very large and can be sent over a very short time. In one case, our engineering team has seen more than 350,000 SMS messages in four minutes. This costs the operator a lot as he is obliged to pay IOT rate, about 5 eurocents for each of these messages. Obviously, this cost can not be transferred to the buyer. It is also a problem because the customer can get a certain number of returns, or even text messages and phone calls. It can be offensive and May cause trouble because customers continue to cost the operator when a customer calls the help line.
It is clear that if the operator can find a way to stop this trick he can save a lot of money, protect their customers and reduce the amount of spam that other customers dobivaju.Prvi step in this, that being able to identify messages sent from counterfeit bills. If this can be done reliably in real time, messages can be blocked by the operator. To begin with these messages where relatively easy to identify as impostors will publish a flood of messages at once. It is clear that no human subscriber could do this and, although the number of messages can get through most of it could be blocked.
Of course, fraudsters quickly became aware of this type of counter mjere.Stoga change his approach and sent messages to the larger intervals spread over a larger number of counterfeit bills. In this way they avoided any moves that the volume of alarms. Once again the anti-fraud measures have been developed. This time the anti-fraud systems have been developed to verify the origin of SMS messages are sent and to block it if it is varied from a known place of true pretplatnika.Protiv fraud because the race has evolved again fraudsters spoofing other parts of the network.
Today is the best way to beat such scams is to use a system that looks at the overall flow of SS7 data network checks for known fraudulent signatures. Such as new forms of fraud identified and can be programmed in real-time filter and the corresponding messages blokiran.Sustav should look for a test message sent by fraudsters and let them through so that the fraudster was not aware that his "campaign" are blocked. Ideally, operators should subscribe to managed services because it allows the knowledge gained in one operator to be used for the benefit of others.
Anti-Fraud SMS never ends so, above all, the operator must constantly be alert and to explore new forms, when they occur.
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