Message Filtering via Hex Code Character Conversion
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Solution Overview
Problem
Existing message filtering methods are ineffective in blocking messages that use special characters or foreign letters to evade keyword filtering, leading to increased spam message transmissions.
Innovation Solution
A method and system that utilize a conversion target letter table to convert special characters and foreign letters to their corresponding regular letters using hex codes, allowing for effective filtering of prohibited words in message texts across various platforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If string matching method is used for message filtering, then simple keyword filtering is achieved, but messages using special characters to elude filtering cannot be blocked
Solution Approach 1:
The patent applies preliminary action by pre-generating a conversion target letter table that maps hex codes to their corresponding conversion letters before the filtering process. This table is created in advance and stored for quick reference during message filtering, allowing the system to efficiently convert special characters to their regular letter equivalents without complex real-time analysis
Solution Approach 2:
The patent introduces an intermediary conversion table that acts as a mediator between the raw message text and the filtering process. The table stores hex code information and corresponding conversion letters, serving as a reference bridge that enables the system to translate obfuscated characters into recognizable forms for effective keyword matching
2Productivity
If conventional string matching filtering is applied, then prohibited words are blocked, but spam messages using symbol combinations to form prohibited words evade filtering
Solution Approach 1:
The patent applies parameter changes by transforming the representation form of characters from their original hex code format to their conversion letter equivalents. By changing the parameter of character representation and using a predefined conversion table, the system maintains fast processing speed while effectively identifying prohibited words that were previously hidden through symbol combinations
3Reliability
If hex code conversion table is generated and used, then messages with special characters are effectively filtered, but system complexity increases
Solution Approach 1:
The patent reduces system complexity by performing preliminary action - the conversion target letter table is generated once in advance and stored for repeated use. This eliminates the need for complex real-time hex code analysis during message filtering, as the system simply references the pre-computed table to perform conversions
Solution Approach 2:
The conversion table serves as a self-service mechanism that automatically provides the mapping between hex codes and conversion letters. Once generated, the table independently handles the conversion process without requiring additional computational resources or complex algorithms during the actual filtering operation
Data Source
AI summary
A system and method for message filtering are disclosed. A conversion target letter table is generated which stores information on letters that may be used to elude filtering, the table storing the hex code information of each letter that may be used for eluding filtering and the conversion letter information regarding the conversion letter to which each letter is to be converted. A hex code of a message text inputted by a user is compared with the hex codes of the table, and when a conversion target letter is included, it is converted to the conversion letter stored in the conversion target table associated with the letter. When the conversion is completed, it is determined whether or not pre-configured prohibited words are included in the converted message; and message filtering is performed.