SMS Message Encryption Handling in IMS Networks
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Solution Overview
Problem
Existing wireless communication systems lack adequate security for SMS messages, particularly in applications involving confidential information such as financial and medical transactions, where hackers or network personnel can potentially observe message content as it passes through the network.
Innovation Solution
A network node with a network interface, recipient determiner, SMS message encryption detector, and message encrypter/decrypter is implemented to determine the encryption requirements of the intended recipient and selectively encrypt or decrypt SMS messages before forwarding, optionally storing unencrypted messages for retrieval via a secure channel if the recipient lacks encryption support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SMS messages are transmitted through the network without encryption, then transmission speed and simplicity are maintained, but security and confidentiality of message content deteriorate
Solution Approach 1:
The patent introduces an SMSC (Short Message Service Center) as an intermediary component that automatically detects whether incoming SMS messages are encrypted and performs conditional decryption or forwarding. This mediator handles the complexity of encryption management centrally, allowing individual mobile devices to maintain simplicity while the network provides enhanced security through the SMSC's intelligent message handling and decryption capabilities.
2Reliability
If encryption is applied to all SMS messages, then security is improved, but processing time and network overhead increase
Solution Approach 1:
The patent implements selective encryption processing where the SMSC applies decryption or security processing only to messages that require it, rather than uniformly processing all messages. The system detects encryption status and applies appropriate handling only when needed, avoiding unnecessary processing overhead for unencrypted messages while maintaining security for encrypted communications.
Solution Approach 2:
The system changes the encryption parameter dynamically based on message characteristics and recipient capabilities. The SMSC detects whether a message is encrypted and adjusts its handling accordingly—decrypting only when necessary and forwarding unencrypted messages through the normal fast path, thereby optimizing processing time while maintaining security where required.
3Reliability
If the network provides general security protocols, then basic protection is available, but adequate security for confidential information cannot be ensured
Solution Approach 1:
The SMSC acts as a security intermediary that enhances basic network security protocols by providing automated encryption detection and decryption services. This mediator handles complex security operations centrally, allowing standard mobile devices to benefit from enhanced security without requiring complex security implementations in each device.
Solution Approach 2:
The system implements self-service security where the SMSC automatically detects encryption status and performs appropriate decryption or forwarding without requiring user intervention or complex device-side security management. The network infrastructure provides the security enhancement service automatically, simplifying the overall system while improving security for confidential communications.
Data Source
AI summary
A system, method, and device for securely forwarding SMS messages in a communication system, for example in a communication system including an IMS network accessible to wireless devices via a radio access network. The communication system forwards SMS messages from a sending station to a receiving station via a network node. The network node, which may be an SMSC in an IMS network, is operable to determine whether the SMS message is encrypted and whether the intended recipient supports encryption, and then the network node selectively encrypts and decrypts received SMS messages prior to forwarding to the intended recipient; SMS messages received unencrypted are encrypted by the SMS message encrypter/decrypter if the intended recipient supports encryption, and SMS messages received encrypted are decrypted by the SMS message encrypter/decrypter if the intended recipient does not support SMS message encryption. SMS messages intended for a recipient determined not to support SMS message encryption may be stored in a holding database, and an alert send to the intended recipient, if the sender requires that the SMS message be sent only in encrypted form.