The Basics Of Online Security And Encryption Algorithms

Key Encryption Algorithms

Online security is something that we consider a lot in our day-to-day lives. We all want the reassurance that all of our details and online transactions are secure. This means protection for bank details, account numbers, personal details, and other sensitive information.

We know that sites promise to be safe with the best protection, but we know little about how this works. Encryption algorithms are at work on numerous websites, from Amazon sales pages to Paypal transactions, for our security.

What Is Encryption And How Do These Encryption Algorithms Work?


There are two main types of services in use online to keep data and transfers secure. The first is the symmetric-key approach. This model has been in use since the 1970s and required a code between a sender and recipient.

The data in the file must be carefully encrypted by the system, transferred and then decoded at the other end. The main problem with this option is that it is too easy to hack in during the transfer process.

The more complicated public-key system gets around that by adding an extra layer. The sender’s computer must encrypt the document with a symmetric key, and then encrypt that with the public key of the recipient.

The recipient computer then uses the private key to decipher the symmetric key and that key to unlock the document. It all sounds complex, but it happens in a flash. This method is part of the Pretty Good Privacy system that is commonly used today.

How Can Be Sure That We Are Entering A Safe Website With Strong Encryption Services?

Encryption Algorithms

Large websites, such as Amazon and Paypal, need to work a little differently for multiple transactions with multiple users. An individual symmetric key needs to go to each visitor/customer for each transaction. Once the session is complete, that key is immediately deleted.

This is the only way to ensure personal security on multiple transactions on such a large site. It is too easy to take security for granted and assume that all major sites are safe. There are ways to check. One is the validity of the digital certificate.

These certificates of authority must relate to the site. The other is to check the address in the address bar. Most secure sites will have an “https” at the start rather than “HTTP.” This indicates that they are using the Transport Layer Security protocol.

Encryption Is Nothing New, But It Is Now Used In A Beneficial New Way To Keep Us Safe

In the end, the best encryption services are the ones that are at work behind the scenes without us knowing. The less we have to think about internet security, the better. These encryption algorithms and keys may seem complicated when explained this way. We must remember that we have been doing this for centuries.

At their heart, these systems are just a digital, advanced version of the ciphers and codes used for secret messages. As long as the principle remains the same, and the code isn’t broken by outsiders, there is no security risk.

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