ZIP Archive Encryption with Digital Signatures and Legacy Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing .ZIP file encryption methods use weak encryption keys, making them insufficient for modern security standards, and lack non-repudiation capabilities, which are crucial for ensuring the identity of the creator and integrity of the encrypted data.
Innovation Solution
Integrating multiple strong encryption methods, including symmetric and asymmetric technologies, into the .ZIP file format to create a secure data container that supports advanced encryption algorithms, key management, and non-repudiation through digital signatures and time-stamping, while ensuring backward compatibility with existing software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If weak encryption keys are used in existing .ZIP file encryption methods, then backward compatibility with existing software is maintained, but security strength is insufficient for modern standards
Solution Approach 1:
The patent segments the encryption system into multiple independent components: traditional symmetric encryption (PKZIP 2.0, PKZIP 3.0, AES) and asymmetric encryption (RSA, DSA, ECDSA). Each encryption method can be independently selected and applied to different files or data streams within the archive, allowing the system to simultaneously support both legacy and modern security requirements without requiring all software to adopt the newest standards at once
Solution Approach 2:
The patent creates a composite encryption system that combines multiple encryption algorithms and key management approaches into a single unified archive format. This composite structure allows weak encryption methods to coexist with strong encryption methods, enabling gradual migration to stronger security while maintaining compatibility with software that only supports traditional encryption
2Reliability
If asymmetric encryption with digital signatures is implemented, then non-repudiation capability is provided, but computational overhead and processing time increase
Solution Approach 1:
The patent divides the archive into multiple data streams, each independently encrypted with asymmetric encryption and digital signatures. This segmentation allows selective application of computationally intensive operations only to critical data portions rather than the entire archive, reducing overall processing time while maintaining non-repudiation for signed portions
Solution Approach 2:
The patent implements partial asymmetric encryption by applying digital signatures and asymmetric encryption only to specific files or data streams within the archive rather than all data. This partial action provides non-repudiation capability where needed while avoiding the computational overhead of encrypting the entire archive with asymmetric methods
3Adaptability or versatility
If multiple encryption methods are integrated into .ZIP files, then flexibility and security are enhanced, but system complexity increases
Solution Approach 1:
The patent creates a universal archive structure that can accommodate multiple encryption methods through a unified data stream framework. Each data stream within the archive can independently specify its encryption type (symmetric or asymmetric) and algorithm, allowing the system to handle diverse encryption requirements through a single, multi-functional interface rather than requiring separate systems for each encryption type
Solution Approach 2:
The patent introduces an intermediary layer in the form of a standardized data stream format that sits between the various encryption algorithms and the archive structure. This intermediary data stream specification translates different encryption methods into a common format, managing the complexity of multiple encryption systems through a unifying intermediate representation
Data Source
AI summary
The present invention provides a method of integrating existing strong encryption methods into the processing of a .ZIP file to provide a highly secure data container which provides flexibility in the use of symmetric and asymmetric encryption technology. The present invention adapts the well established .ZIP file format to support higher levels of security and multiple methods of data encryption and key management, thereby producing a highly secure and flexible digital container for electronically storing and transferring confidential data.