TLS vs SSL – What is the Difference?

Are you interested to know the difference about TLS vs SSL? Then this complete information will help you to understand the difference.

In the last few years, both SSL and TLS protocols have helped in maintaining security and encryption for many websites including eCommerce websites. There has been constant update being made to both these protocols which has indirectly helped in preventing even the most sophisticated cyber threats from hackers. TLS is a descendent of SSL and is regarded to be more powerful and effective with its latest version known to enhance both privacy and performance.

Overall, both SSL and TLS protocols aim to protect sensitive information used during transactions such as payments processing that requires authentication to prove identity of your server to the users. Especially for eCommerce sites, this is of great importance as customers need to place trust on your business while providing their personal information. These protocols also allow you to comply with the industry standards where you may need to maintain a certain level of minimum security. This is especially required if you accept credit card payments and need to adhere to the Payment Card Industry guidelines.


Let’s look at SSL vs TLS protocols in detail and learn about their major differences.

What is TLS?

what is tls

Netscape has invented TLS- a more secure version compares to its predecessor SSL. TLS or Transport Layer Security is a protocol which provides end-to-end security for communications across networks mostly used for online transactions and internet communications. It encrypts the data sent between the server and browsers to ensure that information which is transmitted is not visible to hackers. The most common applications that make use of TLS include instant messaging, web browsers, instant messaging and VOIP. TLS encrypts application layer protocols including HTTP, FTP, SMTP and IMAP.

What is SSL?

what is ssl

Secure Sockets Layer (SSL) was developed in the mid 1990’s by Netscape which was known to among the most popular browsers during the early days. Although SSL 1.0 was never released in the public, SSL 2.0 was known to have some flaws, but SSL 3.0 was released in 1996 which was updated and used few years ago but become obsolete after the entry of TLS version. Thus, SSL helps in building an encrypted link between the client and the server which can be a web server and a browser or a mail server along with a mail client.

SSL enables sensitive information such as personal details, social security numbers or payment related data to be transmitted in a secure manner. Thus, SSL secures millions of data of individuals daily at the time of online transactions and any other confidential information. Users can see the lock icon visible on an SSL secured website or sometimes a green address bar available on the website with an Extended Validation SSL.

Key differences between TLS vs SSL

  • SSL refers to Secure Socket Layer whereas TLS means Transport Layer Security where the former was developed by Netscape in 1994 to have a secure means of communication among the client and server systems. The Internet Engineering Task Force (IETF)standardized the SSL protocol and two versions namely SSL 1.0 which was not released to public due to flaws and later SSL 2.0 was rolled out but there were some design flaws. As a result, upgrades and enhancements were made to release the SSL 3.0 which aimed to fix the earlier flaws.
  • On the other hand, TLS was released in 1999 and the other versions such as TLS 1.1 were released in 2006 and 2008 respectively. However, TLS 1.3 was released in August 2018 which had enhanced features with removal of MD5 and SHA-224 and made use of digital signature with previous configurations.
  • SSL protocol provides support to cipher suites whereas TLS does not provide any such support but uses a standardization protocol which makes it easy to define the new class of cipher suites.
  • TLS protocol does not use the No Certificate alert message and makes use of other alert messages unlike the SSL protocol which still relies on the No Certificate alert message.

Importance of SSL certificate

SSL certificate helps to keep your site secure so that any sensitive information which is transmitted across the Internet is encrypted and reaches only the intended recipient. It assures that customers will have data privacy, security and integrity with SSL. In addition, SSL certificates provide authentication which means you can be assured that the information is being sent to the right server and prevents intruders from having unauthorized access to them.

In addition, SSL certificate can help improve trust among your users as they can find visual cues in the form of a green bar or padlock icon to know that their connection is secure. Customers are more likely to trust websites with SSL certificates that act as a secured way of data transmission and helps boost their confidence when doing payment transactions.

SSL certificate can also prevent phishing attacks which may include links to your website as it nearly impossible for them to obtain a proper SSL certificate and cannot cause damage to sites as most users are aware of trust indicators which they need to look out while browsing sites.

Is SSL or TLS more secure?

TLS provides a more robust message authentication system, key material generation along with other encryption algorithms when compared to SSL. Thus, TLS provides support with remote passwords, elliptical curve keys and pre-shared keys which is not supported by SSL. TLS still provides backward compatibility for older devices. The TLS protocol works on two layers where the TLS record protocol provides security to connections. The TLS handshake protocol brings together client and the server for security key negotiation. Both client and the server authenticate each other before any data transmission.

Why you need to use SSL or TLS protocols?

Online security of data is very crucial for eCommerce websites especially with increasing phishing attacks, malware, DDoS attacks becoming more common these days. Thus, end-to-end encryption and security of communication data has become very crucial to save your valuable data from being stolen by hackers, Both SSL and TLS protocols assist in encryption of network data and they mainly use hash functions, digital signatures or message digests to provide privacy, confidentiality and authentication of the data being transmitted.


SSL and TLS can have an impact on your SEO rankings as Google introduced some major changes to its algorithm in 2014 and since then made it official that https websites will continue to get enjoy more benefits in terms of rankings as they are considered to be more secure and ensure trust among your visitors.


We Assure to Serve

Leading Brands

ClickSSL is platinum partner of leading CAs & offering broad range of SSL certificate products.

Valued Price

You are at right place to get cheapest SSLs; our prices are up to 79% low as compared to CAs.

100% Refund Policy

If you are not satisfied, our all SSL certificates are backed by 30-day 100% money back guarantee.

24×7 Support

Our experts are always active to help you, so you will get instant solutions for your queries.