Sentence Recognition Device Using Encrypted Character Code Tables
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Solution Overview
Problem
Even if characters are encrypted, character data represented by numerical values can be easily identified by a third party, compromising security.
Innovation Solution
A sentence recognition device generates a second character code table by converting and encrypting first character codes, using a predetermined sequence and encryption key, to create a conversion character code table that is difficult to reverse-engineer, enhancing security by making it hard to identify the original characters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If character data is encrypted using a character code table, then security is improved, but if the character codes are represented by numerical values, a third party can easily identify the character, decreasing security
Solution Approach 1:
The patent changes the parameter of character code representation from direct numerical values to encrypted character strings. Each character code is transformed into an encrypted form that cannot be easily reversed to identify the original character, thus maintaining security while preventing character identification by third parties.
2Reliability
If a second character code table is generated by encrypting first character codes, then security is enhanced, but the complexity of the system increases
Solution Approach 1:
The patent applies preliminary action by pre-generating a second character code table through encryption of the first character code table before actual sentence recognition occurs. This pre-computed encrypted mapping table is stored and reused, avoiding the need to perform complex encryption operations during real-time sentence recognition, thus reducing operational complexity while maintaining enhanced security.
Data Source
AI summary
A character code conversion device (10) utilizes not a standard character code table but a conversion character code table that is the converted standard character code, and transmits a conversion character code string indicating a sentence subjected to transmission to a sentence recognition device (20) via a network (N). Hence, even if a third party obtains the conversion character code string, the standard character code table is utilized, and thus the character string specified from the conversion character code string is completely different from the sentence subjected to transmission. Accordingly, proper recognition of the sentence subjected to transmission is difficult. Consequently, the security of the sentence subjected to transmission is enhanced.