After Theft: From Revocation to Neutralization in the Custody of Quantum Clones

2026-09-06

AI Summary

该论文提出了一种利用加密量子克隆来解决量子信息被盗后的问题，通过消耗唯一的解密机会使被盗的量子克隆失效，实现了一种称为中和的更强形式的安全响应机制。

Abstract

Encrypted quantum cloning enables the creation of multiple encrypted clones of an unknown quantum state while allowing only one effective decryption, with the decryption resource being intrinsically consumed in the process. In this paper, we argue that this property supports a distinctive custodial security primitive for post-compromise response. We consider a threat model in which an adversary steals an encrypted quantum clone but does not yet possess the corresponding decryption key. In such a scenario, a legitimate custodian may unseal a different trusted clone, thereby exhausting the sole available unsealing opportunity and rendering the stolen clone permanently useless. We argue that this mechanism is not adequately described as mere revocation. Rather, it realizes a stronger form of post-theft response, which we call neutralization. We formalize this distinction, locate it within a broader post-theft response space, and introduce a temporal threat model. We compare the mechanism with its closest classical analogue, showing that the classical case can reproduce the policy outcome only through external procedural composition. We finally interpret encrypted quantum cloning as a primitive for post-compromise quantum custody in distributed preservation settings, with prospective relevance for Cyber-Humanities-oriented preservation architectures.

Problem

• quantum cloning
• post-compromise response
• neutralization
• custodial security

Innovation

• encrypted quantum cloning
• neutralization
• post-compromise response