An intern at GCHQ pleaded guilty to smuggling top-secret data out of a protected computer, compromising a 'tool' used by the agency.The incident highlighted the vulnerability of even the most sophisticated security protocols to insider threats.According to CISA, insider threats can be malicious or unintentional, originating from employees with authorized access to sensitive data.The breach at GCHQ exposed the names of the agency's employees and was classified as 'top secret', raising concerns about national security.