OSS (One-Shot Signatures) represents a revolutionary post-quantum cryptographic paradigm where quantum secret keys are designed for single-use applications. Once used to sign a message, the quantum key is automatically destroyed, providing unprecedented security guarantees against quantum attacks and preventing key reuse or duplication.
Quantum Key Generation
Generates ephemeral quantum signing keys |sk⟩ paired with classical public verification keys
Single-Use Security
Quantum state collapse ensures keys cannot be copied or reused after signing
Post-Quantum Resistant
Designed to remain secure against both classical and quantum adversaries
Hybrid Cryptography
Enables classical devices to leverage quantum servers without full quantum adoption
1. Key Generation
The quantum signer generates an ephemeral quantum signing key |sk⟩ and a classical public verification key pk accessible to verifiers.
2. Signing
The quantum key |sk⟩ signs a message m, producing a classical signature σ. The quantum key is automatically destroyed upon use.
3. Verification
Anyone with the public key pk can verify the signature σ on message m, guaranteeing authenticity while preserving one-shot security.
Allows secure delegation of signing authority for exactly one message, preventing unauthorized multiple signatures while maintaining quantum security guarantees.
Instant verification across banking systems, replacing multi-day settlements in $150T payment market and saving billions in costs.
Preventing SolarWinds-style attacks, protecting against $100B+ breaches without trusting certificate authorities.
Indestructible signature to satisfy all regulators (SEC, FDA, EPA), now and future.
Quantum-Proof Security
Leverages fundamental quantum mechanics principles to provide security guarantees that remain valid even against quantum adversaries with unlimited computational power.
Prevents Key Reuse Attacks
Automatic key destruction after use eliminates risks associated with key reuse, replay attacks, and double-spending in digital transaction systems.
Future-Ready Architecture
Designed for the quantum computing era while maintaining compatibility with existing classical infrastructure and communication channels.
Current Challenges
- • Secure one-shot chameleon hash construction
- • Non-collapsing hash function requirements
- • Quantum obfuscation for implementation protection
- • Common Reference String (CRS) model limitations
Research Areas
- • Post-quantum signature scheme integration
- • Hybrid quantum-classical protocol design
- • Efficient delegation mechanisms
- • Decentralized consensus without blockchains