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Transport Layer Security (TLS) 1.2 - effective April 23, 2018

Posted on: Wednesday, March 18, 2020-4:51 PM

Transport Layer Security (TLS) is a protocol that ensures that a connection to a remote endpoint is securely encrypted in order to provide privacy and data integrity.  First City Bank's system processor's (Fiserv) web applications and application programming interface (API) connections use TLS as a key component of their security.  TLS 1.2 is the most current version and is considered to be the most secure.  TLS 1.0 and 1.1 are earlier, now less secure versions.  The predecessor to TLS, Secure Sockets Layer (SSL), has been disabled in Fiserv Bank Solutions systems.  

Browsers and operating systems that support TLS 1.2 will typically utilize it by default, preferring TLS 1.2 over older, less secure encryption protocols.  To prepare for this change, First City Bank needs to make sure all customers accessing our online banking services, are using operating systems and browsers that support TLS 1.2.  Below is a basic TLS 1.2 compatibility chart.  

Browser Chart

Browser Chart 2

TLS Chart 1



TLS Chart 2

Note:  Do not uncheck TLS 1.0 and 1.1 as access to other third-party sites that have not yet enabled TLS 1.2 will be adversely affected.