SSL/TLS (Secure Sockets Layer/Transport Layer Security) are cryptographic protocols designed to provide secure communication over a computer network. SSL is the predecessor of TLS, which is now the industry standard. These protocols encrypt the data exchanged between a client and server, ensuring confidentiality, integrity, and authentication. HTTPS (HyperText Transfer Protocol Secure) is the secure version of HTTP, which uses SSL/TLS to encrypt communication between a web browser and a server. HTTPS ensures that sensitive data, such as passwords and credit card information, is transmitted securely, protecting against eavesdropping and tampering during online transactions and browsing.