Search Results - subject:"cryptography"

Repeated games played by cryptographically sophisticated players

GOSSNER, Olivier - Center for Operations Research and Econometrics (CORE), … - 1998

We explore the consequences of the assumptions used in modern cryptographywhen applied to repeated games with public communication. Technically speaking, we model agents by polynomial Turing machinesand assume the existence of a trapdoor function. Under these conditions, we prove a Folk Theorem...

Persistent link: https://www.econbiz.de/10005043731

Novel qubit block encryption algorithm with hybrid keys

Zhou, Nanrun; Liu, Ye; Zeng, Guihua; Xiong, Jin; Zhu, Fuchen - In: Physica A: Statistical Mechanics and its Applications 375 (2007) 2, pp. 693-698

By combining quantum key with classical one, a novel block cryptographic algorithm that can be applied to encrypt qubits is presented. The security of the algorithm is analyzed from several aspects. It is shown that the qubit block encryption algorithm can prevent quantum attacking strategy as...

Persistent link: https://www.econbiz.de/10010871843

A novel quantum block encryption algorithm based on quantum computation

Zhou, Nanrun; Zeng, Guihua; Nie, Yiyou; Xiong, Jin; … - In: Physica A: Statistical Mechanics and its Applications 362 (2006) 2, pp. 305-313

Based on quantum computation, a novel quantum block cryptographic algorithm that can be used to encrypt classical messages is proposed. The security of this algorithm is analyzed from several aspects. It is shown that the quantum block cryptographic algorithm, in which the key can be reused...

Persistent link: https://www.econbiz.de/10010874587

Rising stars in information and communication technology

Heng, Stefan - EconWPA - 2004

The quest for more efficiency and security is reflected in the economy as a whole, but especially in the product and process innovations in information and communication technology (ICT). We examine the ten concepts considered to have the brightest prospects in the business segment in terms of...

Persistent link: https://www.econbiz.de/10005118730

On the role of entanglement in quantum information

Macchiavello, Chiara - In: Physica A: Statistical Mechanics and its Applications 338 (2004) 1, pp. 68-75

We give a tutorial review on the role of entanglement of quantum systems in some tasks of quantum information theory and describe in particular how it can be exploited to achieve secure communication channels.

Persistent link: https://www.econbiz.de/10010591350

Extended space for quantum cryptography using mixed states

Qiao, Bi; Ruda, Harry E.; Xianghua, Zeng; Hu, Bambi - In: Physica A: Statistical Mechanics and its Applications 320 (2003) C, pp. 357-370

A formulation is presented for quantum cryptography based on two mixed states in rigged Hilbert space. This is distinct … from the usual scheme for quantum cryptography based on Hilbert space and Von Neumann quantum mechanics, excluding the … effects of decoherence. We show that under specific conditions, the rigged Hilbert space formulation for quantum cryptography …

Persistent link: https://www.econbiz.de/10010589922

Chaotic and stochastic functions

González, Jorge A.; Pino, Ramiro - In: Physica A: Statistical Mechanics and its Applications 276 (2000) 3, pp. 425-440

We study chaotic functions that are exact solutions to nonlinear maps. A generalization of these functions (which cannot be expressed as a recursive procedure anymore) can produce truly random sequences. Even if the initial conditions are known exactly, the next values are in principle...

Persistent link: https://www.econbiz.de/10011058301

Bitcoin : ¿una solución para los sistemas de pago o una solución en busca de problema?

Conesa, Carlos

En octubre de 2008 se publicó un misterioso artículo bajo el seudónimo de Satoshi Nakamoto: «Bitcoin: a peer-to-peer electronic cash system». Meses después, a principios de 2009, Bitcoin comenzó a operar sin generar apenas atención. Desde entonces hasta hoy, el esquema ha acumulado más...

Persistent link: https://www.econbiz.de/10012532147

Distributed ledger technology (DLT) : introduction

Romero Ugarte, José Luis

Artículo de revista ; Distributed ledger technology is attracting the attention of the financial sector, both owing to its use in transactions with crypto-assets and to the proliferation of initiatives which have the potential to increase the efficiency, transparency, speed and resilience of...

Persistent link: https://www.econbiz.de/10012532339

El camino hacia la supremacía cuántica: oportunidades y desafíos en el ámbito financiero, la nueva generación de criptografía resiliente

López Chamorro, Noemí

This paper presents a straightforward explanation of quantum computing, including the key aspects to understand its benefits, progress level, limitations and applications across various sectors, particularly finance, along with the potential risks it poses to existing cryptographic procedures. A...

Persistent link: https://www.econbiz.de/10014573637