What is SSL?
And why do I see a green padlock on websites, but not on others?
In layman terms, a secure site that shows a green padlock is using encryption between your PC and the server that hosts the website you’re browsing, meaning any information passed between you and the server is safely encrypted.
Here’s another more in-depth explanation.
An SSL (Secure Sockets Layer) certificate is a bit of code on your web server that provides security for online communications by creating an encrypted connection between your web server and visitors’ web browser.
How does it it Work?
Encryption Protects Data During Transmission
In the same way that you lock and unlock doors using a key, encryption makes use of keys to lock and unlock your information. Unless you have the right key, you will not be able to “open” the information.
Each SSL session consists of two keys:
- The public key is used to encrypt (scramble) the information.
- The private key is used to decrypt (un-scramble) the information and restore it to its original format so that it can be read.
When a web browser points to a secured domain, a level of encryption is established based on the type of SSL Certificate as well as the client web browser, operating system and host server’s capabilities. That is why SSL Certificates feature a range of encryption levels up to 256-bit.
Strong encryption, at 128 bits, can calculate 288 times as many combinations as 40-bit encryption. That’s over a trillion times stronger.