Network Cipher Algorithm Management for Defective Terminals
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Solution Overview
Problem
Portable terminals face issues with defective cipher algorithms, where they cannot identify problems in stored cipher algorithms, leading to unnecessary message transmission and reception due to misidentification of signal issues at the link layer.
Innovation Solution
The network system determines if a terminal has a problem with its cipher algorithm and controls it to select a working cipher algorithm, using a history table to manage and update information about problematic terminals, ensuring normal communication operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal uses a stored cipher algorithm for communication, then secure communication is achieved, but the terminal cannot identify defects in the cipher algorithm leading to unnecessary message transmission and reception
Solution Approach 1:
The network system provides feedback by monitoring whether the terminal successfully completes cipher mode setting and channel operations. When defects are detected through failed operations or abnormal responses, the network system identifies the problematic terminal and sends notifications to update or replace the defective cipher algorithm, thereby resolving the detection difficulty while maintaining communication reliability
Solution Approach 2:
The network system acts as an intermediary between terminals and cipher algorithm defects. Instead of requiring terminals to self-diagnose cipher algorithm defects (which they cannot do), the network system monitors communication processes, identifies terminals with defective algorithms through failed operations, and coordinates algorithm updates, thus solving the detection problem while ensuring reliable communication
2Productivity
If the terminal continues message transmission and reception to maintain channel operation, then communication channel availability is maintained, but unnecessary message transmission and reception occurs due to unrecognized cipher algorithm problems
Solution Approach 1:
The network system uses feedback from communication operation results to identify terminals with defective cipher algorithms. When a terminal fails to complete cipher mode setting or channel operations successfully, the network system detects this through abnormal responses or operation failures, then intervenes to update the algorithm, preventing continued unnecessary message transmission and energy waste while maintaining channel availability for healthy terminals
Solution Approach 2:
The system implements a self-service mechanism where terminals that exhibit defective cipher algorithm behavior are automatically identified by the network system and prompted to update their algorithms. This self-diagnosis and self-correction process, triggered by operational failures, eliminates unnecessary message transmission and energy consumption while maintaining communication productivity for properly functioning terminals
Data Source
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AI summary
Disclosed are a cipher control method which supports to maintain a cipher mode between a network system and a terminal. The method of controlling an encryption includes: attempting a connection for operating a communication channel between a terminal and a network system; providing cipher information about a cipher algorithm operation of the terminal to the network system; determining whether the terminal is a problematic terminal operating an abnormal cipher algorithm by the networking system; and when the terminal is determined to be operating abnormal, instructing the terminal to perform a communication channel operation based on a normally operable cipher algorithm by the network system. The network system may compare the cipher information to a predetermined history table including a list of problematic terminals having a history of operating the abnormal cipher algorithm