A Web Application Firewall (WAF) is a security tool that protects web applications by filtering and monitoring HTTP traffic. It is designed to identify and block attacks such as SQL injection, cross-site scripting (XSS), and other common threats that can compromise the security of applications.In the cryptocurrency space, a WAF plays a crucial role in safeguarding exchanges, wallets, and other online services against cyber threats. These platforms often handle sensitive user information and substantial financial transactions, making them attractive targets for hackers.By analyzing incoming traffic, a WAF can distinguish between legitimate requests and potentially malicious ones. It employs a set of rules and policies to filter out harmful content before it reaches the web application. This proactive approach helps in mitigating risks and ensuring the integrity and availability of the services provided.Overall, integrating a WAF is an essential measure for anyone operating in the cryptocurrency sector, enhancing security and maintaining user trust.