Sohma Masaki, Hirota Osamu
Quantum ICT Research Institute, Tamagawa University, Tokyo 194-8610, Japan.
Entropy (Basel). 2022 May 10;24(5):667. doi: 10.3390/e24050667.
In this review paper, we first introduce the basic concept of quantum computer-resistant cryptography, which is the cornerstone of security technology for the network of a new era. Then, we will describe the positioning of mathematical cryptography and quantum cryptography, that are currently being researched and developed. Quantum cryptography includes QKD and quantum stream cipher, but we point out that the latter is expected as the core technology of next-generation communication systems. Various ideas have been proposed for QKD quantum cryptography, but most of them use a single-photon or similar signal. Then, although such technologies are applicable to special situations, these methods still have several difficulties to provide functions that surpass conventional technologies for social systems in the real environment. Thus, the quantum stream cipher has come to be expected as one promising countermeasure, which artificially creates quantum properties using special modulation techniques based on the macroscopic coherent state. In addition, it has the possibility to provide superior security performance than one-time pad cipher. Finally, we introduce detailed research activity aimed at putting the quantum stream cipher into practical use in social network technology.
在这篇综述论文中，我们首先介绍抗量子计算机密码学的基本概念，它是新时代网络安全技术的基石。然后，我们将描述当前正在研究和开发的数学密码学和量子密码学的定位。量子密码学包括量子密钥分发（QKD）和量子流密码，但我们指出，后者有望成为下一代通信系统的核心技术。针对QKD量子密码学已经提出了各种想法，但其中大多数使用单光子或类似信号。那么，尽管这些技术适用于特殊情况，但在实际环境中，这些方法仍有若干困难，难以提供超越传统技术的社会系统功能。因此，量子流密码有望成为一种有前途的对策，它基于宏观相干态使用特殊调制技术人工创建量子特性。此外，它有可能提供比一次性密码本密码更高的安全性能。最后，我们介绍了旨在将量子流密码应用于社交网络技术的详细研究活动。
