Non-Repudiation in Internet Telephony

SPAM over Internet Telephony and how to deal with it

In our modern society telephony has developed to an omnipresent service. People are available at anytime and anywhere. Furthermore the Internet has emerged to an important communication medium. These facts and the raising availability of broadband internet access has led to the fusion of these two services. Voice over IP or short VoIP is the keyword, that describes this combination. The advantages of VoIP in comparison to classic telephony are location independence, simplification of transport networks, ability to establish multimedia communications and the low costs. Nevertheless one can easi…

A Novel Approach For Intranet Mailing For Providing User Authentication

With the explosion of the public Internet and e-commerce, private computers, and computer networks, if not adequately secured, are increasingly vulnerable to damaging attacks. Hackers, viruses, vindictive employees and even human error all represent clear and present dangers to networks. Various antidotes that are in fact inextricable with security issues are - Cryptography, Authentication, Integrity and Non Repudiation, Key Distribution and certification, Access control by implementing Firewalls etc.The main idea of this paper is to overcome the PGP's(Pretty Good Privacy) main limitation of i…

数字世界中的信息安全与隐私：若干专题

Information Security and Privacy in the Digital World: Some Selected Topics

本书围绕生成式AI与物联网时代的数据安全挑战，汇集了密码学与通信安全领域在认证、加密、完整性及隐私保护等方面的最新研究成果。

轻量且坚韧的签名方案用于云辅助嵌入式物联网系统

Lightweight and Resilient Signatures for Cloud-Assisted Embedded IoT Systems

本文提出轻量且坚韧签名方案，通过硬件辅助实现高效、安全的物联网签名，解决云辅助环境下的密钥安全问题。

Energy-Aware Digital Signatures for Embedded Medical Devices

Authentication is vital for the Internet of Things (IoT) applications involving sensitive data (e.g., medical and financial systems). Digital signatures offer scalable authentication with non-repudiation and public verifiability, which are necessary for auditing and dispute resolution in such IoT applications. However, digital signatures have been shown to be highly costly for low-end IoT devices, especially when embedded devices (e.g., medical implants) must operate without a battery replacement for a long time. We propose an Energy-aware Signature for Embedded Medical devices (ESEM) that ach…

面向数字孪生的带硬件支持的后量子混合数字签名

Post-Quantum Hybrid Digital Signatures with Hardware-Support for Digital Twins

针对数字孪生场景下低端IoT设备后量子签名成本高、无聚合且缺前向安全的问题，提出三种HASES轻量签名方案，基于硬件辅助CCO实现高效签名，性能优于现有方案并开源供适配。