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A cryptographic algorithm is proposed based on fully quantum mechanical keys and ciphers. Encryption and decryption are carried out via an appropriate measurement process on entangled states as governed by a quantum mechanical, asymmetrical…

Quantum Physics · Physics 2007-05-23 Guihua Zeng , Carlos Saavedra , Christoph H. Keitel

Electronic voting systems have significant advantages in comparison with physical voting systems. One of the main challenges in e-voting systems is to secure the voting process: namely, to certify that the computed results are consistent…

Cryptography and Security · Computer Science 2025-05-21 Tamir Tassa , Lihi Dery , Arthur Zamarin

Countries like Estonia, Norway or Australia developed electronic voting systems, which could be used to realize parliamentary elections with the help of personal computers and the Internet. These systems are completely different in their…

Cryptography and Security · Computer Science 2017-02-10 Christian Meter

Blockchain has proven to be an emerging technology in the digital world, changing the way everyone thinks about data security and bringing efficiency to several industries. It has already been applied to a wide range of applications, from…

Cryptography and Security · Computer Science 2023-02-09 Md. Mijanur Rahman , Md Tanzinul Kabir Tonmoy , Saifur Rahman Shihab , Riya Farhana

The advent of Web 3.0, underpinned by blockchain technologies, promises to transform the internet's landscape by empowering individuals with decentralized control over their data. However, this evolution brings unique security challenges…

Cryptography and Security · Computer Science 2023-07-25 Danyal Namakshenas

Recent advances indicate that quantum computers will soon be reality. Motivated by this ever more realistic threat for existing classical cryptographic protocols, researchers have developed several schemes to resist "quantum attacks". In…

Quantum Physics · Physics 2021-04-21 Myrto Arapinis , Elham Kashefi , Nikolaos Lamprou , Anna Pappa

Studying the computational complexity and designing fast algorithms for determining winners under voting rules are classical and fundamental questions in computational social choice. In this paper, we accelerate voting by leveraging quantum…

Computers and Society · Computer Science 2023-06-12 Ao Liu , Qishen Han , Lirong Xia , Nengkun Yu

Elections are not the only but arguably one of the most important pillars for the proper functioning of liberal democracies. Recent evidence across the globe shows that it is not straightforward to conduct them in a free and fair manner.…

Cryptography and Security · Computer Science 2025-09-23 Uwe Serdült

During the Coincheck incident, which recorded the largest damages in cryptocurrency history in 2018, it was demonstrated that using Mosaic token can have a certain effect. Although it seems attractive to employ tokens as countermeasures for…

Cryptography and Security · Computer Science 2021-02-26 Teppei Sato , Keita Emura , Tomoki Fujitani , Kazumasa Omote

We present an online voting architecture based on partitioning the election in small clusters of voters and using a new Multi-party Computation algorithm for obtaining voting results from the clusters. This new algorithm has some practical…

Cryptography and Security · Computer Science 2016-03-15 Juanjo Bermúdez

Due to potential capability of providing unconditional security, arbitrated quantum signature (AQS) schemes, whose implementation depends on the participation of a trusted third party, received intense attention in the past decade.…

Quantum Physics · Physics 2015-06-05 Qin Li , Chengqing Li , Zhonghua Wen , Weizhong Zhao , W. H. Chan

In this paper a new multi-candidate electronic voting scheme is constructed with unlimited participants. The main idea is to express a ballot to allow voting for up to k out of the m candidates and unlimited participants. The purpose of…

Cryptography and Security · Computer Science 2018-01-01 Xi Zhao , Yong Ding , Quanyu Zhao

As artificial intelligence (AI) systems become increasingly complex and autonomous, concerns over transparency and accountability have intensified. The "black box" problem in AI decision-making limits stakeholders' ability to understand,…

Cryptography and Security · Computer Science 2025-03-13 Afroja Akther , Ayesha Arobee , Abdullah Al Adnan , Omum Auyon , ASM Johirul Islam , Farhad Akter

Blockchain is a decentralized, distributed ledger technology that ensures transparency, security, and immutability through cryptographic techniques. However, advancements in quantum computing threaten the security of classical cryptographic…

Cryptography and Security · Computer Science 2026-01-14 Nicholas J. C. Papadopoulos

Due to the rapid development of quantum computing, many classical blockchain technologies are now considered insecure. The emergence of quantum blockchain holds promise for addressing this issue. Various quantum consensus algorithms have…

Cryptography and Security · Computer Science 2024-12-10 Jianming Lin , Hui Li , Hongjian Xing , Runhuai Huang , Weixiang Huang , Shaowen Deng , Yanping Zhang , Weimin Zeng , Ping Lu , Xiyu Wang , Tao Sun , Xiongyan Tang

In a traditional cloud storage system, users benefit from the convenience it provides but also take the risk of certain security and privacy issues. To ensure confidentiality while maintaining data sharing capabilities, the…

Cryptography and Security · Computer Science 2023-09-11 Jingchi Zhang , Anwitaman Datta

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 cryptography. In recent years, a number of protocols have…

Quantum Physics · Physics 2016-12-01 Joseph F. Fitzsimons

This study explores the application of Quadratic Voting (QV) and its generalization to improve decentralization and effectiveness in blockchain governance systems. The conducted research identified three main types of quadratic (square…

Computer Science and Game Theory · Computer Science 2025-04-18 Lyudmila Kovalchuk , Mariia Rodinko , Roman Oliynykov , Andrii Nastenko , Dmytro Kaidalov , Kenric Nelson

Decentralisation is one of the promises introduced by blockchain technologies: fair and secure interaction amongst peers with no dominant positions, single points of failure or censorship. Decentralisation, however, appears difficult to be…

Distributed, Parallel, and Cluster Computing · Computer Science 2019-11-20 Andrea Bracciali , Davide Grossi , Ronald de Haan

We propose a blockchain architecture in which mining requires a quantum computer. The consensus mechanism is based on proof of quantum work, a quantum-enhanced alternative to traditional proof of work that leverages quantum supremacy to…