What is ssl certificate
What is ssl certificate :- SSL stands for Secure Socket Layer. An SSL provides an additional level of security to websites. Essentially what it does is creates a secure connection between the client and the host so that information sent between the two is encrypted and secured. The secure layer starts when a client enters a website into their browser and connects to the host. For example, if I open up the website for M&T Bank, I can see that the traffic is secured. All information send from my computer (Client) to the M&T Bank site (Host) is encrypted as it moves through the web to each point. When the client or the host receives data it is then decrypted so it is readable. While the information travels it is encrypted and if anyone would scrape the data, it would be in an unreadable format.
This is because of the secure layer of communication, which is established by the SSL. For there to be a secure connection established, the host must have a SSL Certificate installed. This certificate is a small piece of code that performs two functions. The first function the certificate does is provides information about the identity of a business, website, or individual to verify the authenticity of the site. This information is displayed when you launch a website with a padlock symbol. If you click on that padlock it will provide you with details about the certificate issuer and holder. The highest trusted level of SSL authentication is the Extended Validation SSL. Those can be more costly and take more time to get established. For an organization or business like a bank or online store, it tells visitors that they when through an extended verification process.
What is ssl certificate :-
The second function is processing data encryption. This function allows information and communication to be transferred over the internet between client and host, without being able to be intercepted by a malicious party. Only the intended recipient (client or host) of the information will be able to read it. Think of this like going to the airport. If you are going to travel you need a passport, which is a metaphorical SSL Certificate. It is issued by a trusted authority, in this instance the government. There are strict rules on who can and cannot obtain one. When the traveler (host with a certificate) reaches security (client), the information is presented, verified, and passage permitted. The encryption on the SSL works just like a physical lock. If you do not have the right key, the door will not open. An SSL uses two keys: public and private.
Public Key: encrypt information for transmission
Private Key: decrypt information and make it readable Now that we have a grasp on some of the mechanical elements and terminology, we can go a little deeper into the process of how the SSL handshake between the client and host occurs.
SSL Handshake: Greeting between the client’s browser and the host. Every SSL when it is issued, is for a specific website address. When the client enters the host’s web address into their browser this handshake or greeting occurs. This handshake provides the following: information to create a secure link for the connection and a unique key for the session. After that process, secure communication begins.
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