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Chinese Journal of Electronics

Encrypting Binary Bits via Quantum Cryptography

ZENGGuihua

Published Jan 1, 2004• 5 citations
OpenAlex

Abstract

A quantum cryptographic algorithm, which may be exploited to encrypt classic information is investigated theoretically in this paper. The proposed algorithm can prevent quantum attack strategy as well as classic attack strategy. A proof-in-principle of experimental demonstration, which exploits optical fibre communication technology and photon technology, is suggested.

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A quantum cryptographic algorithm, which may be exploited to encrypt classic information is investigated theoretically in this paper. The proposed algorithm can prevent quantum attack strategy as well as classic attack strategy. A proof-in-principle of experimental demonstration, which exploits optical fibre communication technology and photon technology, is suggested.
A realizable quantum encryption algorithm for qubits is presented by employing bit-wise quantum computation. System extension and bit-swapping are introduced into the encryption process, which makes the ciphertext space expanded greatly. The security of the proposed algorithm is analysed in detail and the schematic physical implementation is also provided. It is shown that the algorithm, which can prevent quantum attack strategy as well as classical attack strategy, is effective to protect qubits. Finally, we extend our algorithm to encrypt classical binary bits and quantum entanglements.
Based on the principles of both classical and quantum computation primitives, a new symmetric key quantum cryptographic algorithm is proposed. This algorithm can be used to encrypt classical binary messages as well as quantum information. Encryption and decryption are implemented by the aid of classical and quantum computation which can be realized by suitable technology. Because each encryption process is under the control of the key which is dynamically and recursively changed through each round in both encryption and decryption and the final ciphertext states are non-orthogonal, the eavesdropper can not acquire fixed ciphertext without the keys so the eavesdropping attack is invalid, which is guaranteed with the no-cloning theory in quantum mechanics. Similarly, the non-orthogonality of the ciphertext renders the Trojan horse attack strategy impossible. Also the algorithm applies a pseudo random process from stage to stage. This pseudo randomness hinders the ability of Eve to attack such a cryptographic scheme.
The globe is observing the emergence of the Internet of Things more prominently recognized as IoT. In this day and age, there exist numerous technological apparatuses that possess the capability to be interconnected with the internet and can amass, convey, and receive information concerning the users. This technology endeavors to simplify existence, however, when the users' information is the central concern for IoT operation, it is necessary to adhere to security measures to guarantee privacy and prevent the exploitation of said information. The customary cryptographic algorithms, such as RSA, AES, and DES, may perform adequately with older technologies such as conventional computers or laptops. Nevertheless, contemporary technologies are heading towards quantum computing, and this latter form possesses a processing capability that can effortlessly jeopardize the aforementioned cryptographic algorithms. Therefore, there arises an imperative necessity for a novel and resilient cryptographic algorithm. To put it differently, there is a requirement to devise a fresh algorithm, impervious to quantum computing, that can shield the information from assaults perpetrated utilizing quantum computing. IoT is one of the domains that must ensure the security of the information against malevolent activities. Besides the conventional cryptography that enciphers information into bits, quantum encryption utilizes qubits, specifically photons and photon polarization, to encode data.
Quantum cryptography represents a revolutionary paradigm shift in secure communication by leveraging the principles of quantum mechanics to guarantee unbreakable encryption. Unlike classical cryptographic methods dependent on computational hardness, quantum cryptography exploits quantum phenomena such as superposition and entanglement to provide provable security against eavesdropping. This paper explores fundamental quantum cryptographic protocols, their operational principles, and recent advances that enable practical deployment. We further discuss challenges, implementation issues, and the future scope of quantum key distribution (QKD) technologies in securing global communication infrastructures
Based on a quantum shift register, a novel quantum block cryptographic algorithm that can be used to encrypt classical messages is proposed. The message is encoded and decoded by using a code generated by the quantum shift register. The security of this algorithm is analysed in detail. It is shown that, in the quantum block cryptographic algorithm, two keys can be used. One of them is the classical key that is used in the Hill cipher algorithm where Alice and Bob use the authenticated Diffie Hellman key exchange algorithm using the concept of digital signature for the authentication of the two communicating parties and so eliminate the man-in-the-middle attack. The other key is generated by the quantum shift register and used for the coding of the encryption message, where Alice and Bob share the key by using theBB84 protocol. The novel algorithm can prevent a quantum attack strategy as well as a classical attack strategy. The problem of key management is discussed and circuits for the encryption and the decryption are suggested.