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What is TLS?

TLS stands for “Transport Layer Security.” It is a protocol that provides privacy and data integrity between two communicating applications. It’s the most widely deployed security protocol used today, and is used for web browsers and other applications that require data to be securely exchanged over a network, such as access to CSB’s Online Banking platform. TLS ensures that a connection to a remote endpoint is to the intended endpoint through encryption and endpoint identity verification.

What is changing and how will it affect me?

In an effort to provide the highest level of security for our customers, we will be disabling connection to Online Banking from devices using any Transport Layer Security (TLS) less than 1.2. 

TLS 1.0 and TLS 1.1 will be disabled on March 28, 2018 at 9:00pm and Users need to have devices capable of TLS 1.2 or higher in order to access CSB’s Online Banking (via web or mobile). To avoid any interruption in service, we recommend you ensure all of your systems and devices support TLS 1.2 or higher prior to March 28, 2018.

What action do I need to take to ensure I am able to continue accessing CSB’s Online Banking (via web and mobile)?

To avoid any disruptions in service, we recommend that you upgrade your software or equipment prior to March 28, 2018, which is when we will be disabling TLS 1.0 and TLS 1.1.

What browsers/OS versions support TLS 1.2 and higher?

Below is a list of the minimum browser versions and Operating Systems (OSs) that are available for use on our Online Banking and support TLS 1.2 & higher. CSB always recommends keeping your Operating System (OS) and browsers up to date and patched. 

Browser / OS


Internet Explorer (IE) / Windows* 7, 8.1


Edge / Windows 10








Safari / OS X 10.10+


Android OS Browser


Apple iPhone Safari / iOS


 * Windows XP and Vista are no longer supported by Microsoft and should not be used. If you have a computer that is running these OSs it is likely 7+ years old and will need to be replaced as modern Operating Systems will likely not be compatible with your hardware.

Are there older versions of operating systems/ browser combinations that will not support TLS 1.1 & higher?

Yes. Windows XP and Windows Vista are only capable of upgrading up to Internet Explorer version 8. Therefore, anyone using Internet Explorer as their browser will not be able to connect to our Online Banking.  The other major browsers mentioned above have also stopped support for Windows XP and most for Vista as well. Chrome 50+ and Firefox 43+ will not support XP or Vista. Apple Mac OS X 10.9 and earlier have older versions of Safari and will not support TLS 1.2.

What should I do if I am unable to connect to Online Banking after this change is made?

If you are unable to connect to CSB’s Online Banking after we disable old encryption versions (TLS 1.0 and 1.1), please follow the troubleshooting instructions below. These steps will aid in determining the encryption issue you may have with connecting to Online Banking as it relates to this change:

  1. If you cannot connect to our Online Banking website you can test your OS/Browser by going to https://www.ssllabs.com
  2. Click on Test your browser:

3. Once the test is complete you should see the following under Protocol: 

4. If you do not, then you need to update your browser and/or OS

5. If you cannot update your browser to be compatible then you will likely need a newer computer.

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