Japanese educational and learning systems in the post-industrial society: A value chain of educational and learning systems

Japan's educational system has some major problems. The most important among these concerns is the basic concept of the educational process and the goal of education. The old concept of public educational systems has become outdated in today's Japanese society, although this concept had supported social and spiritual faith, economic success and selfless devotion to one's country for more than 100 years. Now, Japanese people need a new concept of the educational process and the goal of education for the twenty-first century. The paper proposes a value chain of educational and learning systems aimed at building a network consisting of multiple fields for fostering future human resources.     

一种基于椭圆曲线的序列号软件保护方案

这里提出了一种基于椭圆曲线公钥密码算法的序列号生成方案,结合签名技术,可以防止敌手代码被篡改或者跳过某些重要代码,因此该方案构成一种安全有效的软件保护方案,最后分析了该方案的安全性,并进行了方案的有效性实验.     

DES加密算法在秘密共享中的应用

秘密共享思想提出后,经过几十年的发展已经出现了很多不同方案、模型等。本文根据秘密共享的特性提出了一种基于对称密钥系统的秘密共享方案。该方案解决了一些秘密共享现有的问题的,尤其是可验证性。存储在密钥分发者的信息都是加密后的密文,因此,其抗攻击的强度就是使用的加密算法的强度。通过简单C＋＋程序实现这一方案。对方案的可行性进行分析。     

通用高效的数据库存储加密研究

文章提出了一种不同于目前所有数据库存储加密方式的通用高效的存储加密模式.这种加密模式适用于绝大多数的关系型数据库系统.作者以一种开源数据库管理系统为例描述了存储加解密的实现,并对性能进行了分析.     

无线网络中密钥管理技术概述

密钥管理技术是基本的安全技术之一,在无线网络中扮演重要的角色。无线网络中密钥管理技术的研究是近年来的热点。本文概述了无线网络中密钥管理技术,即无线传感器网络和无线自组网络中的密钥管理技术。     

Efficient chosen-ciphertext secure certificateless threshold key encapsulation mechanism

As a practical extension of our previous work on certificateless threshold cryptosystem, this paper proposes the first direct certificateless threshold key encapsulation mechanism that inherits the same trust level of the original scheme and removes the length limitation of a traditional public key encryption. Security against threshold chosen-ciphertext attacks are proved in a random oracle model under a new assumption. It tolerates the Type I adversary that can replace public keys and the Type II adversary that has access to the system’s master key. The implied encapsulation scheme is very efficient when compared to the most efficient schemes in a traditional public key cryptosystem, and it is slightly more efficient in terms of key length and encapsulation speed when compared to the identity-based cryptosystems that have the same ciphertext overhead. Finally, we describe several potential modifications of our scheme.     

A pairing-free identity-based authenticated key agreement protocol with minimal message exchanges

Based on the computational Diffie-Hellman problem, this paper proposes an identity-based authenticated key agreement protocol which removes bilinear pairings. Compared with previous protocols, the new protocol minimizes message exchange time with no extra cost. The protocol provides strong security guarantees including key compromise impersonation resilience, perfect forward secrecy, and master key forward secrecy. A security proof with the modular approach in the modified Bellare-Rogaway model is also provided.     

基于分簇无线传感器网络密钥预分配管理方案研究

针对无线传感器网络节点计算和存储能力有限,能量受限等特点,提出了一种新的分簇传感器网络密钥预分配管理方案KDNKPD。该方案借助于Blundo二元多项式函数和密钥分发节点建立节点与簇头间的安全通信,能够适应簇首节点的按轮选举并解决了Blundo方案的安全问题。通过安全分析与性能分析比较和仿真实验表明,该方案提高了网络的安全性,减少了传感器节点的存储开销和计算开销。     

Dual-key-binding cancelable palmprint cryptosystem for palmprint protection and information security

Biometric cryptosystems and cancelable biometrics are both practical and promising schemes to enhance the security and privacy of biometric systems. Though a number of bio-crypto algorithms have been proposed, they have limited practical applicability because they lack of cancelability. Since biometrics are immutable, the users whose biometrics are stolen cannot use bio-crypto systems anymore. Cancelable biometric schemes are of cancelability; however, they are difficult to compromise the conflicts between the security and performance. By embedded a novel cancelable palmprint template, namely “two dimensional (2D) Palmprint Phasor”, the proposed palmprint cryptosystem overcomes the lack of cancelability in existing biometric cryptosystems. Besides, the authentication performance is enhanced when users have different tokens/keys. Furthermore, we develop a novel dual-key-binding cancelable palmprint cryptosystem to enhance the security and privacy of palmprint biometric. 2D Palmprint Phasor template is scrambled by the scrambling transformation based on the chaotic sequence that is generated by both the user's token/key and strong key extracted from palmprint. Dual-key-binding scrambling not only has more robustness to resist against chosen plain text attack, but also enhances the secure requirement of non-invertibility. 2D Palmprint Phasor algorithm and dual-key-binding scrambling both increase the difficulty of adversary's statistical analysis. The experimental results and security analysis confirm the efficiency of the proposed scheme.