HTTPS is the secure version of HTTP, using TLS (or its predecessor SSL) to encrypt data transmitted between a client (like a web browser) and a server. TLS is the underlying protocol that provides the security; HTTPS is the application that uses it. Think of it like this: HTTPS is the car, and TLS is the engine that makes it run securely.
HTTPS: The Secure Web
HTTPS (Hypertext Transfer Protocol Secure) ensures secure communication over the internet. When you see the padlock icon and "https://" at the beginning of a website URL, it signifies that the connection is encrypted using TLS. This encryption protects sensitive data like passwords, credit card information, and personal details from being intercepted by malicious actors.
- Key Features: Encryption, authentication, data integrity.
- Purpose: Secure web browsing and data transmission.
- How it works: Uses TLS/SSL to encrypt HTTP traffic.
TLS: The Encryption Protocol
TLS (Transport Layer Security) is a cryptographic protocol that provides secure communication over a network. It's the mechanism that underpins HTTPS, ensuring data confidentiality, integrity, and authentication. TLS establishes an encrypted connection, preventing eavesdropping and tampering with data during transit. While SSL (Secure Sockets Layer) was the predecessor to TLS, it is now considered obsolete and insecure. Modern implementations universally use TLS.
- Key Features: Encryption algorithms, digital certificates, handshake process.
- Purpose: Secure communication between two systems.
- How it works: Establishes an encrypted channel for data transfer.
In short: HTTPS is the secure version of HTTP that uses TLS to provide the encryption and security features. TLS is the underlying protocol that handles the encryption and secure communication. HTTPS uses TLS.
Examples:
- Browsing your online banking website: HTTPS utilizes TLS to encrypt your login credentials and transaction data.
- Making an online purchase: HTTPS secures the transfer of your credit card information.
As stated in several references, HTTPS uses TLS (or its outdated predecessor, SSL) to create a secure connection. The provided snippets consistently reinforce this relationship: TLS is the cryptographic protocol that provides security, while HTTPS is the application protocol leveraging TLS for secure communication.
