What are MITM attacks & how to prevent them

Man-in-the-middle (MITM) attacks remain a significant cybersecurity threat, exploiting gaps in implementation rather than flaws in encryption itself. These attacks intercept communications between two parties, often without their knowledge, by exploiting network vulnerabilities or security oversights, such as misconfigured TLS, outdated cryptographic libraries, and weak internal trust assumptions. Common tactics include ARP and DNS spoofing, SSL stripping, and rogue Wi-Fi networks. Despite advancements in security protocols like HTTPS and TLS, MITM attacks persist due to issues like inadequate certificate validation, insecure token management, and improper session handling, especially in mobile and IoT environments. Organizations face heightened risks, particularly in distributed architectures and when relying on public networks or outdated systems. Detecting MITM attacks requires vigilance for signs such as unexpected disconnections, suspicious URLs, and network anomalies, while prevention demands rigorous enforcement of security practices at every layer, including the use of HSTS, mutual TLS, and secure coding standards. The focus should be on building security into systems from the ground up to ensure data integrity and trust, leveraging tools like OAuth2 with PKCE and robust TLS enforcement for secure identity and session management.