Uncovering threats in digital systems: a deep dive into BGP, the blockchain, and Telegram

Digital systems have become integral to daily life, driven by the widespread adoption of the Internet, social networks, and blockchain technology. While these advancements enhance access to information, communication, and secure transactions, they also introduce new risks, such as cyber-attacks, misinformation, and financial fraud. This thesis analyzes and proposes solutions to these vulnerabilities, focusing on Internet routing security, cryptocurrency scams, and the impact of conspiracy theories on instant messaging platforms.