Secure Data Transmission with Packet Timing Verification
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Solution Overview
Problem
Existing data transmission systems lack effective security measures against tampering, replay, and injection attacks, particularly in communication between data processing entities.
Innovation Solution
A method involving creating a sequence of data packets with predefined transmission delays, where each packet includes an indication of its delay, ensuring packets are received at the correct time, and only accepted if timing matches, thereby detecting tampering attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data transmission is implemented unprotected, then ease of operation is improved, but security against tampering deteriorates
Solution Approach 1:
The system performs preliminary actions by embedding timing information and delay indications in packets before transmission. The sender pre-calculates and includes expected reception times and delay values in each packet, enabling the receiver to verify timing characteristics before accepting the data, thus preventing tampering without complicating the transmission process
Solution Approach 2:
The invention implements feedback by having the receiver verify packet timing against expected values and reject packets that do not match the indicated delays. This feedback mechanism ensures that only properly timed, untampered packets are accepted, maintaining security while keeping the transmission process simple
2Reliability
If timing verification is implemented for each packet, then security against replay attacks is improved, but device complexity worsens
Solution Approach 1:
The invention extracts the security verification function into a separate, dedicated timing check mechanism. Instead of complicating the overall system, it isolates the timing verification logic to compare packet timestamps against expected values, making the complexity manageable and focused only on the essential security function
Solution Approach 2:
The system changes parameters by using simple timestamp comparison and delay indication values rather than complex cryptographic protocols. By transforming the security verification into a parameter-based timing check, the system achieves replay attack protection with minimal added complexity
3Reliability
If individual transmission delays are determined and verified for each packet, then detection of tampering is improved, but loss of time worsens
Solution Approach 1:
The invention applies partial action by performing only essential timing verification - comparing packet timestamps against expected values based on indicated delays. It does not perform exhaustive analysis but focuses on the critical timing parameter, achieving tampering detection with minimal time overhead
Solution Approach 2:
The sender performs preliminary calculation of expected reception times and embeds delay indications in packets before transmission. This preliminary action enables the receiver to quickly verify timing without complex real-time calculations, reducing the time loss during verification
Data Source
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AI summary
Present invention concerns a method (400) for secure data transmission from a sender (105) to a receiver (110), the sender (105) and the receiver (110) being connected with a transmission line (115). The method (400) comprises steps of creating (405) a sequence (145) of data packets (140); determining (410) individual transmission delays for the packets (140); including (410) an indication of a transmission delay of one packet (140) into a preceding packet (140) in the sequence (145); transmitting (415) the packets (140) in sequence (145) from the sender (105) to the receiver (110) over the line (115), wherein a packet (140) is transmitted at a time that is determined on the basis of its associated transmission delay. After that, it may be determined (425) whether a packet (140) was received at a time that matches the indication received in the preceding packet (140). The packet (140) may only be accepted (430) if this is the case and rejected or ignored otherwise.