One-Shot Signatures
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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.
One-Shot Signature Architecture
One-shot signatures leverage quantum mechanics principles to create cryptographic keys that self-destruct after a single use, making forgery and key reuse physically impossible through the no-cloning theorem.
Quantum Key Generation
Generates ephemeral quantum signing keys |sk⟩ paired with classical public verification keys
Post-Quantum Resistant
Designed to remain secure against both classical and quantum adversaries
Single-Use Security
Quantum state collapse ensures keys cannot be copied or reused after signing
Hybrid Cryptography
Enables classical devices to leverage quantum servers without full quantum adoption
Protocol Components
Key Generation
The quantum signer generates an ephemeral quantum signing key |sk⟩ and a classical public verification key pk accessible to verifiers.
Signing
The quantum key |sk⟩ signs a message m, producing a classical signature σ. The quantum key is automatically destroyed upon use.
Verification
Anyone with the public key pk can verify the signature σ on message m, guaranteeing authenticity while preserving one-shot security.
Table of contents
Key Applications
Signature Delegation
Allows secure delegation of signing authority for exactly one message, preventing unauthorized multiple signatures while maintaining quantum security guarantees.
Financial Services
Instant verification across banking systems, replacing multi-day settlements in $150T payment market and saving billions in costs.
Software Security
Preventing SolarWinds-style attacks, protecting against $100B+ breaches without trusting certificate authorities.
Regulatory Compliance
Indestructible signature to satisfy all regulators (SEC, FDA, EPA), now and future.
Why One-Shot Signatures?
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.
Technical Implementation
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
Real-World Applications
Application
Description
Security Benefit
Digital Identity
Secure authentication with automatic key expiration
Prevents credential theft and reuse
Financial Transactions
Single-use payment authorization preventing double-spending
Quantum-resistant transaction security
Smart Contracts
Self-executing contracts with quantum-secured single operations
Immutable execution guarantees
Secure Communications
Message authentication with forward secrecy
Perfect forward secrecy through key destruction
Decentralized Finance
Quantum-secure DeFi operations without traditional consensus
Eliminates 51% attacks and consensus manipulation
Digital Rights Management
Single-use content access with quantum protection
Prevents unauthorized copying and distribution
Learn More About One-Shot Signatures
Interested in exploring one-shot signatures for your applications? Read our comprehensive research: One-Shot Signatures: A New Paradigm in Quantum Cryptography
General Inquiries
Investor Relations