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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. The Bank of Washington's 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 our systems.
To maintain the highest standards for our data security and to align with the payment card industry data security standards (PCI DSS) and industry best practices, we are disabling TLS 1.0 and 1.1 in our bank applications. To help ensure that you do not experience unnecessary service interruptions, we recommend you upgrade your OS version to Windows 7 or newer, and your browser to one of the following: Microsoft Edge, Microsoft Internet Explorer 11, Firefox 27 or higher, Google Chrome 38 or higher, Desktop Safari 7 or higher, Mobile Safari 5 or higher.