Paperback is a Rust project that implements a novel paper-based backup scheme for long-term data preservation. It securely splits a secret key into multiple 'key shards,' which can be distributed to different individuals. Paperback addresses the problem of single-point-of-failure backup strategies by requiring multiple shards for data recovery, ensuring that no single party holds sufficient information to decrypt the backup alone. The core approach leverages Shamir's Secret Sharing.
Paperback stands out through its unique paper-based approach to secret sharing, offering a resilient and decentralized backup solution. The design allows for reconstruction of data from a threshold of shards, even if some shards are lost or compromised. It elegantly handles key shard recovery and provides a mechanism for expanding the quorum of available shards. The system supports a straightforward workflow for backup, recovery, and shard management.
- Encryption: Data is encrypted before being split into key shards.
- Key Shard Splitting: Uses Shamir's Secret Sharing for secure key splitting.
- Shard Management: Provides tools for backing up, recovering, expanding, and recreating shards.
- User-Friendly Interface: Offers command-line tools for managing the backup process.
- QR Code Integration: Employs QR codes for efficient storage and retrieval of shard data.
Paperback is currently experimental, with ongoing development and potential changes to its format. While fully functional, the design is evolving, and users should expect format changes in future versions. The project has a moderate number of stars and forks, indicating growing interest, and recent commit activity suggests active development. Documentation is available, though further refinement is ongoing.
Paperback benefits individuals and organizations seeking a resilient and decentralized backup solution. It provides a robust method for protecting valuable data against loss, theft, or disaster. Real-world use cases include long-term archival, digital wills, and protecting against data breaches. Paperback offers a valuable alternative to traditional centralized backup systems by distributing the master key and creating redundancy.