Abstract As quantum computing advances, traditional cryptographic systems such as RSA and elliptic curve cryptography face the risk of becoming obsolete. Post-quantum cryptography (PQC) aims to develop algorithms and protocols that remain secure even against adversaries equipped with large-scale quantum computers. This article provides an overview of the motivation, principles,…
Side-Channel Attacks
Mechanisms, Techniques, and Modern Countermeasures Side-channel attacks (SCAs) have evolved from academic curiosities into some of the most powerful and realistic threats to cryptographic systems, hardware devices, and embedded platforms. Unlike conventional attacks that target software flaws or cryptographic weaknesses, SCAs extract sensitive information by exploiting physical leakages produced as…
Hardening Linux
Linux, and particularly Ubuntu, is widely used in servers, cloud environments, and personal systems due to its stability, flexibility, and open-source nature. However, default installations are rarely optimized for security. Hardening your Linux system is essential to reduce vulnerabilities, protect sensitive data, and prevent unauthorized access. This article outlines practical…
Bootloader Security: The First Line of Defense in Modern Devices
The bootloader is a small but critical piece of software that initializes the hardware and loads the operating system when a device powers on. Despite its seemingly low profile, the bootloader plays a central role in a device’s security posture. If compromised, attackers can gain persistent, low-level access, bypassing operating…
Docker in Cybersecurity
A Powerful Tool for Isolation, Testing, and Secure Development Introduction Docker has become one of the most influential technologies in modern DevOps and cloud environments. By packaging applications into lightweight containers, Docker simplifies deployment and ensures consistency across systems. However, beyond DevOps, Docker is also a highly valuable tool in…
Hardware Trojans and Supply Chain Attacks: The Invisible Threat Inside Modern Computing
In the last decade, hardware security has shifted from a niche research area into one of the most critical strategic concerns for governments, enterprises, and technology manufacturers. As global electronics production increasingly relies on complex, internationally distributed supply chains, the risk of adversaries embedding malicious functionality directly into hardware has…
Homomorphic Encryption: Capabilities, Challenges, and Hidden Security Pitfalls
Homomorphic encryption (HE) has long been considered a “holy grail” in cryptography. By enabling computation directly on encrypted data, HE promises secure cloud processing, privacy-preserving analytics, and confidential machine learning. While the theory behind homomorphic encryption is sound and the security foundations are robust, real-world implementations introduce subtle vulnerabilities and…
Differential Fault Analysis: Breaking Modern Cryptography Through Controlled Error Injection
Differential Fault Analysis (DFA) is one of the most powerful and realistic cryptanalytic techniques against hardware implementations of cryptographic algorithms. Originally demonstrated against DES in the late 1990s, DFA has since evolved into a general methodology capable of breaking AES, RSA, ECC, and numerous lightweight ciphers used in IoT and…