Secure Socket Layer (SSL) What is SSL? Secure Socket Layer (SSL) is a cryptographic protocol that establishes secure communication over the internet, protecting data from eavesdropping and tampering. Explanation SSL encrypts data transmitted between users and servers, ensuring confidentiality and authenticity. It is commonly used in websites to secure online transactions and personal information. Practical Example of SSL An e-commerce site uses SSL to encrypt customer payment details during online transactions, safeguarding sensitive information.