Quantum technologies hold the promise of not only faster algorithmic processing of data, via
quantum computation, but also of more secure communications, in the form of quantum …

Quantum cryptography is the art and science of exploiting quantum mechanical effects in
order to perform cryptographic tasks. While the most well-known example of this discipline is …

From the winner of the Turing Award and the Abel Prize, an introduction to computational
complexity theory, its connections and interactions with mathematics, and its central role in …

Fully homomorphic encryption is an encryption method with the property that any
computation on the plaintext can be performed by a party having access to the ciphertext …

We present a new scheme for quantum homomorphic encryption which is compact and
allows for efficient evaluation of arbitrary polynomial-sized quantum circuits. Building on the …

Artificial intelligence (AI) and classical machine learning (ML) techniques have
revolutionised numerous fields, including quantum communication. Quantum …

A multi-party semi-quantum key agreement (SQKA) protocol based on delegating quantum
computation (DQC) model is proposed by taking Bell states as quantum resources. In the …

Quantum mechanical effects have enabled the construction of cryptographic primitives that
are impossible classically. For example, quantum copy-protection allows for a program to be …

Based on the four-dimensional layered quantum states and the delegating quantum
computation (DQC) model, a new quantum private comparison (QPC) protocol is designed …

Existing classical ciphertext retrieval schemes are mainly developed according to the
homomorphic encryption that is a cryptographic technique based on computational …