Applied Cryptography

As we expand beyond the Big Six cryptographic applications, the NHS contact tracing app offers an intriguing case study in how cryptography supports real-world security requirements. Despite its ultimate non-adoption, this app provides valuable lessons in applied cryptography, particularly due to the detailed white paper released by the UK government during the early stages of […]

Understanding cryptography in action is essential for mastering cybersecurity principles. This article examines case studies of the Big Six applications (Wi-Fi, secure mobile calls, TLS, secure email, vehicular entry, and Bitcoin), exploring the cryptographic choices, security needs, algorithms, and key management challenges associated with each. 1. Wi-Fi Security Constraints Influencing Cryptographic Choices Main Security Services

In today’s interconnected world, understanding key cybersecurity technologies is critical. This article focuses on the Big Six foundational concepts in cybersecurity, providing a beginner-friendly exploration of these technologies and their real-world applications. 1. Wi-Fi Security Wi-Fi, particularly in home environments, is a ubiquitous technology requiring robust security measures to protect data from unauthorized access. Key

In the realm of cybersecurity, public-key management plays a crucial role in establishing trust, confidentiality, and authenticity. One of the most fundamental challenges in using public-key cryptography is providing assurance that a public key genuinely belongs to the intended entity. Without this assurance, there is a risk that an attacker could intercept or alter communication

As cybersecurity continues to evolve, encryption methods are adapting to meet new challenges and demands. One of the most groundbreaking developments in this area is Attribute-Based Encryption (ABE), which expands upon the concept of Identity-Based Encryption (IBE) to provide more flexible, policy-driven encryption systems. This article delves into ABE and explores its potential applications in

Identity-Based Encryption (IBE) is a cryptographic system that simplifies key management by associating a user’s identity with their public key. In Chapter 11, Section 11.4.2 of Martin’s Public-key Management book, the concept of IBE is explored as a powerful alternative to traditional public-key infrastructures. This article explains how IBE works, its benefits, and its potential

Public-key infrastructure (PKI) relies heavily on cryptographic keys to ensure secure communication. One concept that helps to manage and validate these keys is the Web of Trust (WoT). This decentralized approach, outlined in Chapter 11, Section 11.4 of Martin’s work on public-key management, offers an alternative to traditional Certificate Authorities (CAs). In this article, we’ll

Public Key Infrastructure (PKI) plays a pivotal role in ensuring secure communication over the internet. However, as highlighted by Ellison and Schneier in their seminal paper, “Ten Risks of PKI: What You’re Not Being Told About Public Key Infrastructure” (2000), there are critical risks that organizations must address when implementing PKI. In this article, we’ll

IntroductionIn today’s cybersecurity landscape, website security is more critical than ever. Let’s Encrypt, an influential service provider, has gained significant attention for democratizing secure website connections. This article explores what Let’s Encrypt offers, why it has become a cornerstone of modern web security, and the reasons behind its widespread adoption. What Is Let’s Encrypt? Let’s

IntroductionIdentity cards play a critical role in modern cybersecurity frameworks, serving as a cornerstone for personal identification and secure access. Chapter 12, Section 12.6, of Read Martin’s Cryptographic Applications explores how cryptography empowers identity card systems to ensure robust data protection and authentication. This article delves into the key insights of this case study, explaining