Removable Tape Cartridge Encryption Key Management
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Solution Overview
Problem
Existing data storage solutions for removable media, such as tape cartridges, face challenges in managing encryption keys, especially in large environments and during disaster recovery, where identifying the correct key for encrypted data is difficult and vulnerable to interception.
Innovation Solution
A data storage arrangement where the removable data storage item stores an encryption key, and a data transfer device reads and uses this key to encrypt data, with a tamper-evident packaging system ensuring the decryption key's security and accessibility only through disturbing the packaging, and a database associating unique identifiers with decryption keys for easy retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption keys are stored in the tape drive or host computer and managed through software, then data can be encrypted, but key management becomes difficult and complex in environments with many tape cartridges
Solution Approach 1:
The system divides the key management function into two separate components: an encryption key stored on the tape cartridge itself and a decryption key stored separately in secure storage. This segmentation eliminates the need to manage multiple encryption keys across multiple devices, as each tape cartridge carries its own encryption key, simplifying the overall key management architecture.
Solution Approach 2:
The encryption key is extracted from the tape drive or host computer and placed directly on the tape cartridge. This extraction removes the burden of key management from centralized locations (tape drives and host computers) and distributes it to the individual cartridges, thereby reducing key management complexity while maintaining security.
2Reliability
If multiple encryption keys are distributed across multiple tape drives and host computers, then data can be encrypted, but finding the correct key for restoration becomes time-consuming and difficult
Solution Approach 1:
By assigning a unique encryption key to each tape cartridge and storing it directly on the cartridge, the system eliminates the need to search through multiple devices to find the correct key. The key is segmented and embedded with its corresponding data, enabling immediate identification and retrieval during restoration.
Solution Approach 2:
Each tape cartridge becomes self-sufficient by carrying its own encryption key, eliminating the need for external key management systems to locate and provide the correct key. The cartridge itself provides the key needed for its own encryption and future decryption, reducing retrieval time and simplifying the restoration process.
3Reliability
If encryption keys are transmitted through SCSI commands or software interfaces, then data can be encrypted, but key transmission becomes vulnerable to interception
Solution Approach 1:
The encryption key is extracted from transmission channels (SCSI commands, software interfaces) and embedded directly on the tape cartridge during the manufacturing or initialization process. This eliminates the need to transmit keys through vulnerable communication channels, as the key remains in secure, static storage on the cartridge itself.
Solution Approach 2:
The encryption key is loaded onto the tape cartridge in advance during manufacturing or initialization, before any data encryption occurs. This preliminary action ensures the key is already in place and eliminates the need for subsequent key transmission, thereby removing the vulnerability to interception during key delivery.
4Reliability
If backup software with encryption is used, then data can be encrypted before passing to tape drive, but data throughput performance is limited
Solution Approach 1:
The encryption function is extracted from software and implemented as a hardware feature of the tape cartridge itself. The cartridge includes the encryption key and the capability to perform encryption/decryption operations, eliminating the software processing bottleneck and enabling higher data throughput while maintaining security.
Solution Approach 2:
The tape cartridge acts as an intermediary that performs encryption/decryption operations locally, eliminating the need for software-based encryption processing. This intermediary approach allows the cartridge to handle encryption independently, improving data throughput by removing the software processing step while maintaining strong security through hardware-based key management.
Data Source
AI summary
A data storage arrangement comprising a data transfer device and a removable data storage item, the removable data storage item storing an encryption key, and the data transfer device being operable to read the encryption key from the removable data storage item, encrypt data using the encryption key; and transfer the encrypted data to the removable data storage item. Additionally, a method of distributing a key for use in encrypting data to be stored on a removable data storage item, the method comprising: storing an encryption key to a removable data storage item, the removable data storage item having a unique identifier; storing an association of the unique identifier and a decryption key, the decryption key for use in decrypting data encrypted using the encryption key; receiving from a user a unique identifier of a removable data storage item; and returning to the user a decryption key associated with the received unique identifier.