What are SSL certificates and why it is relevant to us?

SSL (Secure Socket layers) certificates are what allow websites to migrate from HTTP (HyperText TransferProtocol) to HTTPS (HyperText TransferProtocol Secure).

Which is an extension of HTTP for a more secure connection to the internet.

An SSL certificate is a data file received in a website’s source server. 

SSL certificates include the website public key and the website identity, accompanying with associated information.

Devices like laptop computers and phones etc. trying to connect with the source server will reference this file to get the public key and authenticate the server’s identity.

 The private key is retained undisclosed and protected.

In the Private key, the equivalent key is used for encoding and decoding. 

This key is symmetrical since it is the alone key that is copy or share by another party to decipher the ciphertext. It is quicker than public-key encryption.

The Public key has a couple of keys that are utilised. 

one key is utilised for encrypting and the other key is utilised for decryption. 

One key means a public key is used to encipher the plain text to transform it into ciphertext and another private key is used by the receiver to decipher the ciphertext to read the message.

Now coming back to SSL, It is the conventional security protocol technology that grants secure transmission connecting between web servers and clients (Web Browsers) across an unsafe network, such as in the worldwide web. 

It keeps the secrecy and decency of the information interchanged between a web server and a client.

The network server is needed to have an SSL certificate to authenticate a secure SSL communication.

SSL encrypted network connection fragments that are over the transport layer, which is an element of a network connection over the program layer.

Secure Socket Layer operates through an asymmetrical cryptographical manner, by which the web browser generates a public key and a private key.

 The public key which is a certificate signalling request is situated in a data file. The private key is generated for the receiver only.

It executes the data, that is distributed among users and websites which is impossible to read. 

It uses encoding algorithms to jumble while transmitting the data, to restrict cybercriminals from reading it, it includes our ID & Passwords of bank account, Debit/Credit card, Social media and different other confidential information etc.

SSL certificates authenticate the website which you are visiting and all the information & personal details shared by you on the websites like Amazon, Flipkart, Facebook etc. are kept safe.

Nowadays, every webserver means clients are smart and have a security

feature that restricts you from visiting websites

without SSL and HTTPS and warns you not to proceed further on the website.

SSL is the previous version of TLS (Transport Layer Security) protocol it is updated and more secure than SSL.

We can see security certificates by clicking on the top left corner of the browser search bar then

we have to click on the certificate after which we can see the date of the

certificate issued, the expiration date of the certificate, certificate path and certain few things as well.

SSL certificate version 2011(2.0) and 2015 (3.0) are discontinued and replaced with its upgraded version TLS (Transport Layer Security).

SSL certificates do expire and their validity remains till 27

months which can be brought forward up to 3 months

means 24 months plus 3 months extra given to renew it.


These certificates do expire because from time to time any kind of information and

re-validation is needed to check the website is still accurate doing good or

not because things on the internet change frequently companies are sold or

purchased in this time span so timely authentication plays a very crucial role so expiration is also important.

If you visited any expired SSL certificate website it will show a

warning and the HTTPS “S” is removed and the lock is unlocked and become red. 

Importance of SSL certificates-

Secure Socket Layer

Data Privacy-

The secrecy of information is managed to utilise a set of protocols, which includes the SSL Record & Handshake, Change CipherSpec Protocol, and SSL Alert Protocol. 

So, with all of these SSL protocols secret information, such as bank account details, financial card numbers, login details of social media transmitted securely.

Data integrity-

The data can’t be modified. It is not sent as plain text because it was ciphered and encrypted, so still, if data is caught by hackers it cannot be deciphered or decoded.

Client-server verification-

It makes use of cryptography to encode and decode data on the internet with public and private keys and also by ciphering plain text.


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