SMPP Transmitter Source Address Validation for Spoofing
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Solution Overview
Problem
SMS spoofing is not effectively managed in mobile networks, leading to issues with authenticating the source address of SMS messages, which can result in illegitimate activities.
Innovation Solution
Implementing an SMPP transmitter that validates the source address of SMS messages before transmission by inserting validity indicators into SMPP PDUs, allowing the SMPP transceiver to determine whether to deliver the message, thereby reducing the occurrence of SMS spoofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SMS spoofing is allowed without validation, then the ease of operation for legitimate SMS spoofing (e.g., replacing source address with company name) is maintained, but the reliability of the mobile network is compromised due to illegitimate spoofing activities
Solution Approach 1:
The patent introduces an intermediary validation mechanism within the SMPP protocol that acts as a mediator between the SMS transmitter and transceiver. The validity indicator field serves as an intermediary element that carries authentication information without disrupting the existing SMS transmission flow, allowing legitimate operations while blocking illegitimate spoofing attempts.
Solution Approach 2:
The patent applies preliminary action by validating the source address and inserting the validity indicator into the SMPP PDU before the SMS message is transmitted to the transceiver. This pre-validation ensures that authentication checks are performed in advance, preventing illegitimate spoofed messages from being delivered while allowing legitimate messages to pass through unchanged.
2Reliability
If source address validation is implemented in SMPP protocol, then the reliability of SMS message authentication is improved, but the device complexity of the SMPP transmitter and transceiver increases
Solution Approach 1:
The patent applies local quality by making the validity indicator field optional rather than mandatory. This allows network elements that require enhanced security to utilize the validation feature while maintaining backward compatibility with simpler implementations. The validation mechanism is applied locally where needed rather than universally, reducing overall system complexity.
Solution Approach 2:
The patent changes the parameter structure of the SMPP PDU by adding an optional validity indicator field. This parameter change enables authentication functionality without fundamentally altering the core SMPP protocol structure. The existing message transmission parameters remain unchanged, allowing incremental adoption and reducing implementation complexity.
3Measurement precision
If validity indicators are inserted in all SMPP PDUs, then the measurement precision of spoofing detection is improved, but the loss of time for message processing increases
Solution Approach 1:
The patent applies partial action by implementing validation selectively rather than universally. The validity indicator is inserted based on specific conditions and network policies, allowing high-precision detection where needed while reducing processing overhead in situations where validation is less critical. This selective approach balances detection precision with processing efficiency.
Data Source
AI summary
Systems and methods are disclosed for managing Short Messaging Service (SMS) spoofing using Short Messaging Peer-to-Peer (SMPP) protocol. An SMPP protocol communication includes an SMPP transmitter and an SMPP transceiver. The SMPP transmitter identifies or receives an SMS message for transmission to a destination. The SMPP transmitter identifies a source address for the SMS message, and determines whether the source address is authentic. If the source address is not authentic, then the SMPP transmitter inserts a validity indicator in an SMPP Packet Data Unit (PDU), along with the SMS message, that the source address is not authentic before transmitting the SMPP PDU to the SMPP transceiver. Upon receiving the SMPP PDU from the SMPP transmitter, the SMPP transceiver may determine whether or not to deliver the SMS message to the destination based on the validity indicator provided by the SMPP transmitter.