Semiotics is the study of signs, symbols, and how meaning is constructed and understood. In cybersecurity, semiotics examines how digital cues - such as icons, badges, or warning messages - communicate security-related information to users. Understanding semiotics helps designers and security professionals create interfaces that clearly convey risks, permissions, or safe actions. Effective use of semiotics can reduce user errors, improve compliance, and foster trust by ensuring that security signals are intuitive and easily interpreted. This field bridges communication theory and cybersecurity, highlighting the importance of visual and textual cues in digital environments.