Qubit-based Unclonable Encryption with Key Recycling
arXiv:2004.04084
Abstract
We re-visit Unclonable Encryption as introduced by Gottesman in 2003. We look at the combination of Unclonable Encryption and Key Recycling, while aiming for low communication complexity and high rate. We introduce a qubit-based prepare-and-measure Unclonable Encryption scheme with re-usable keys. Our scheme consists of a single transmission by Alice and a single classical feedback bit from Bob. The transmission from Alice to Bob consists entirely of qubits. The rate, defined as the message length divided by the number of qubits, is higher than what can be achieved using Gottesman's scheme. We provide a security proof based on the diamond norm distance, taking noise into account.
References in corpus (6)
- Simple Proof of Security of the BB84 Quantum Key Distribution Protocol
- Optimal eavesdropping in quantum cryptography with six states
- Post-selection technique for quantum channels with applications to quantum cryptography
- Lower and upper bounds on the secret key rate for QKD protocols using one--way classical communication
- Secure quantum key distribution using squeezed states
- Quantum authentication with key recycling