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What is SSL Certifications?

Secure Socket Layer Protocol Certificate, SSL certificate was developed by Netscape to add security factor to the transactions between browsers and web servers. It is a type of passport or drivers� license for a website issued by a trusted source known as Certificate Authority. It allows data encryption on the Internet. An SSL certificate protects sensitive communication on your website by establishing a secure connection between web browsers and servers, server to server and web based applications. In other words, SSL certificates allow information, such as data transfer, login credentials, social security numbers and credit card, to be transmitted securely.

So who needs an SSL certificate?

Here are a few examples of websites that need SSL server certificates:

Websites that comply with privacy and security requirements.
Websites that receive online orders and credit cards.
Websites that have a login or sign in.
Websites that process sensitive information.

How SSL Works:

This is how a Secure Socket Layer Protocol Certificate works.

A secure page is requested by a browser - https:// usually

A public key is sent by a web server along with its certificate.
The browser then verifies that the certificate is issued by a trusted source that the certificate is valid and is allied to the website contacted.
Upon verification, the public key is then used by a browser essentially to encrypt a random symmetric encryption key and is transmitted to the server with the URL that is encrypted and required along with the other encrypted http data.
The symmetric key is then decrypted by a web server using its private key and the server then uses the symmetric key to decrypt the http data and URL.
The requested html document and http data is then transmitted by the web server encrypted with the symmetric key.
And finally the http data and html document is decrypted by the browser using the symmetric key and the information is displayed.

Types of SSL Certificates:

Dedicated SSL Certificates: These types of Certificates are specifically assigned to the website's unique domain name. So dedicated SSL certificates often require unique domain names and cannot be shared with multiple domain names, not even sub domains. These types of Certificates are usually most expensive.
Shared SSL Certificates: As the name itself suggests, shared SSL Certificates are the ones that can be shared with others unlike dedicated SSL Certificates. What that means that you can use someone else's SSL Certificate for your own website, but the drawback is that the name on the certificate would not match yours but it will reflect the name of whoever is the owner of that certificate. Most importantly during the transition of website between web servers and hosts, this type of SSL encryption cannot be used. These types of SSL Certificates are mainly offered by many ecommerce web hosts making things really easy and all inclusive.

Free SSL Certificates: By using the word free, we don't mean that it comes at absolutely no cost, but these are the certificates where the cost is far less than compared to above three types of SSL Certificates. There are many companies offering these types of certificates but the level of encryption they have are not same as the paid ones and hence its really important to consider getting this kind of protection from a reputable organization.
Wildcard SSL Certificates: These types of Certificates are mainly used for websites having sub domains ensuring the complete protection of all the sub domains. Wildcard SSL protection authorizes protection of different aspects of a Web portal with one SSL Certificate.
When it comes to SSL security, one most important thing to keep in mind while making comparison between different types of SSL Certificates is the level of security offered. However 128 bit encryption is what Industry standard is. Even 256-bit comparison is available for a increased fee and some companies even offer 58 bit encryption to make it less expensive. The logic is that higher the encryption number, the better you get the security.