Quantum Fire with Delegated Cloning
Researchers propose delegatable quantum fire, requiring a separate cloning key, with two classical-oracle constructions including torch-fire using unclonable quantum torch keys.
The paper extends the quantum fire primitive, where clonable quantum 'flame' states resist classical telegraphing, so that cloning requires a key and can be delegated to designated quantum servers. It gives two constructions in the classical-oracle model: one using a classical secret key, and 'torch-fire' using quantum cloning keys (torches) that are consumed-neutral but cannot be split. An adversary holding m torches cannot enable more than m noncommunicating parties to clone fresh challenge flames, even with arbitrary joint preprocessing and entanglement.
- Introduces delegatable quantum fire where cloning requires a separate key, unlike prior public-cloning constructions
- Torch-fire uses quantum torch keys that cannot be split or reused to enable extra cloning
- Adversary with m torches cannot let more than m separated parties clone challenge flames
- Both constructions rely on public classical oracles queryable in quantum superposition
From the original article
1 min read at arxiv.orgQuantum fire is a recently introduced cryptographic primitive consisting of efficiently preparable quantum states, called \emph{flames}, that admit efficient cloning but resist efficient telegraphing, namely reconstruction via classical communication without preshared entanglement.
By Rohit Chatterjee · arxiv.org
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