Anonymisation is the process of removing or altering personal information from data so that individuals cannot be identified. In cybersecurity, anonymisation techniques are used to protect user privacy by hiding or masking details such as names, addresses, or online identifiers. This makes it much harder for anyone, including authorities or cybercriminals, to trace specific actions or data back to a particular person. Anonymisation is commonly used in data sharing, online browsing, and digital communications to reduce privacy risks and comply with data protection laws.