Encryption Process Using Conversion Table Regions
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Solution Overview
Problem
Existing encryption methods struggle to represent encrypted data using only character codes assigned to characters in a character encoding scheme, especially when the number of character codes is not a power of 2, leading to issues with bit length and data representation.
Innovation Solution
A conversion table with regions storing 2^i character codes is used to convert character codes into index values, which are then encrypted and converted back into character codes of the same length, ensuring the encrypted data can be represented by character codes defined in the scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional encryption algorithms are used to encrypt character data, then encryption strength is maintained, but the encrypted data extends over all character codes including unassigned codes, making it unrecognizable to character-handling software
Solution Approach 1:
The conversion table is divided into multiple regions, where each region stores 2^i character codes associated with index values. This segmentation allows the encryption system to map encrypted values to specific character code ranges, ensuring that only valid character codes are generated while maintaining encryption strength through the use of multiple discrete regions.
Solution Approach 2:
Index values serve as an intermediary between the encrypted data and character codes. The conversion table acts as a mediator that translates encrypted values into valid character codes by associating index values with specific character code ranges, thereby bridging the gap between cryptographic output and character encoding requirements.
2Ease of operation
If Base64 encoding is used to convert encrypted data into character codes, then software compatibility is improved, but the bit length of the encrypted data increases by approximately 1.3 times
Solution Approach 1:
The system changes the parameter of character code allocation by using conversion tables that map encrypted values to specific character code ranges. By adjusting how character codes are assigned and organized in the conversion table regions, the system maintains the original data size while ensuring compatibility with character-handling software through proper character code selection.
3Length of stationary object
If character codes are converted into shorter bit sequences before encryption, then data size is reduced, but it becomes impossible to represent all character codes assigned to characters
Solution Approach 1:
The conversion table is segmented into multiple regions, each handling 2^i character codes with appropriate index values. This segmentation allows the system to cover all necessary character codes by distributing them across multiple regions with different index value ranges, thereby maintaining complete character code coverage while optimizing data representation.
Solution Approach 2:
The system adds a regional dimension to the conversion table structure, where character codes are organized across multiple regions with different index value assignments. This dimensional organization allows efficient representation of all character codes without requiring uniform bit length, enabling compact storage while maintaining complete character code coverage.
Data Source
AI summary
A process, a device, and a computer-readable medium storing a program, for encryption. A conversion table having regions each of which stores 2i character codes associated with index values is provided, where i is a natural number predetermined for each region, the 2i character codes are defined in a predetermined character encoding scheme, and the index values have a minimum necessary bit length for uniquely identifying the 2i character codes within each region. First character codes constituting a plaintext are converted into index values by reference to respectively corresponding regions of the conversion table. Then, the index values are encrypted without changing the bit lengths, and the encrypted values are converted into second character codes associated with index values identical to the encrypted values by reference to the respectively corresponding regions of the conversion table, a sequence of the second character codes is outputted as an encrypted text.