Quick definition: Hypertext Transfer Protocol Secure (HTTPS) is an encrypted version of HTTP that uses SSL/TLS protocols to secure data transfers. It protects sensitive information and verifies website identity through a secure, encrypted connection.
Explanation
Hypertext Transfer Protocol Secure (HTTPS) is the secure version of HTTP, the primary protocol used to send data between a web browser and a website. It functions by encrypting communication using Transport Layer Security (TLS), or formerly Secure Sockets Layer (SSL), to protect the integrity and confidentiality of data. When a connection is established, the browser and server perform a “handshake” to verify the server’s identity via an SSL/TLS certificate and agree on session keys. This process ensures that sensitive information, such as login credentials or credit card numbers, cannot be intercepted or tampered with by third parties like hackers or internet service providers.
A common misconception is that HTTPS guarantees a website is safe or trustworthy; in reality, it only secures the connection, meaning a malicious site can still use HTTPS to encrypt its traffic. Another myth is that HTTPS significantly slows down website performance, but modern protocols like HTTP/2 have made the speed difference negligible. Additionally, some believe HTTPS is only necessary for financial sites, while it is now a standard for all web traffic to ensure privacy and improve search engine rankings.
Why it matters
- – Protects your personal information, such as passwords and credit card details, by scrambling the data so it cannot be read by others while traveling across the internet
- – Verifies that you are connected to the legitimate website you intended to visit, helping you avoid fake versions of popular sites designed to steal your information
- – Ensures the content you see on a webpage has not been tampered with or altered by third parties, such as internet service providers injecting unwanted advertisements or malicious links
How to check or fix
- – Look for a padlock icon in the browser’s address bar to verify that the connection to the website is encrypted
- – Confirm the website URL begins with “https://” instead of “http://” to ensure data is transmitted over a secure channel
- – View the security certificate details to check the validity period and ensure it was issued by a trusted certificate authority
- – Enable a protocol that forces the browser to only connect via secure channels, preventing accidental use of unencrypted connections
- – Inspect the browser’s security indicators for warnings about mixed content, which occurs when a secure page loads insecure images or scripts
- – Avoid entering sensitive personal or financial information on any website that is flagged by the browser as “not secure”
Related terms
HTTP, SSL/TLS, Encryption, SSL Certificate, Public Key Infrastructure, Transport Layer Security
FAQ
Q: What is HTTPS and why is it used?
A: HTTPS is a secure version of the HTTP protocol used to encrypt data sent between a web browser and a website. It protects sensitive information like login credentials and financial details from being intercepted by unauthorized parties.
Q: How can I tell if a website is using HTTPS?
A: You can identify an HTTPS-enabled site by looking for “https://” at the beginning of the URL and a padlock icon in your browser’s address bar. Modern browsers also often flag non-HTTPS sites with a “Not Secure” warning.
Q: Does HTTPS protect my entire device?
A: No, HTTPS only secures the specific connection between your browser and the website you are visiting. For broader protection of your device’s entire network traffic and to hide your overall browsing activity, you should use a VPN in addition to HTTPS.