Device security refers to the protection of electronic devices from unauthorized access, theft, data breaches, and other cybersecurity threats. This includes securing devices such as smartphones, laptops, tablets, and IoT devices to prevent sensitive information from being compromised. Device security measures typically include encryption, password protection, firewalls, antivirus software, and regular software updates to patch any vulnerabilities. Ensuring device security is essential in today's digital world to safeguard personal and sensitive information.