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ФИЗИКА ЭЛЕМЕНТАРНЫХ ЧАСТИЦ И АТОМНОГО ЯДРА

Плотное квантовое хеширование: Аннотации

А. В. Васильев

Published Sep 24, 2025• 0 citations
OpenAlex

Abstract

We present a modified version of the simplified quantum hash function that provides improved encoding capabilities and allows us to double the amount of classical information stored in the series of single-qubit states. We give the analysis of the one-way property and collision resistance of the proposed function.

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In the paper we propose a method of quantum hashing which mostly combines the existing constructions of universal hash families with quantum one-way functions. Next, we define the concept of a quantum hash generator and present an approach for building a large number of various quantum hash functions. The construction is based on the integration of a classical e-universal hash family and a given family of functions quantum hash generator. The proposed construction combines the properties of robust representation of information by classical error-correcting codes together with the possibility of highly reliable representation of information by quantum systems. In particular, we present a quantum hash function based on the Reed-Solomon code and prove that this construction is optimal in the sense of the number of qubits needed.
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We present a version of quantum hash functions based on non-binary discrete functions. The proposed quantum procedure is 'classical-quantum', that is, it takes a classical bit string as an input and produces a quantum state. The resulting function has the property of a one-way function (pre-image resistance); in addition it has properties analogous to classical cryptographic hash second pre-image resistance and collision resistance. We also show that the proposed function can be naturally used in a quantum digital signature protocol.
In the letter we define the notion of a quantum resistant ( -resistant) hash function which consists of a combination of pre-image (one-way) resistance ( ε -resistance) and collision resistance ( δ -resistance) properties. We present examples and discussion that supports the idea of quantum hashing. We present an explicit quantum hash function which is ‘balanced’, one-way resistant and collision resistant and demonstrate how to build a large family of quantum hash functions. Balanced quantum hash functions need a high degree of entanglement between the qubits. We use a phase transformation technique to express quantum hashing constructions, which is an effective way of mapping hash states to coherent states in a superposition of time-bin modes. The phase transformation technique is ready to be implemented with current optical technology.
In the paper we define a notion of a resistant quantum hash function which combines a notion of pre-image (one-way) resistance and the notion of collision resistance. In the quantum setting one-way resistance property and collision resistance property are correlated: the "more" a quantum function is one-way resistant the "less" it is collision resistant and vice versa. We present an explicit quantum hash function which is "balanced" one-way resistant and collision resistant and demonstrate how to build a large family of balanced quantum hash functions.