York County 911 is continually focused on the security of our systems.

On Thursday, March 30^th this site will require and only support a Transport Layer Security (TLS) 1.2 or 1.3 connection.

TLS is the successor to SSL (Secure Sockets Layer). TLS provides secure communication between web browsers and servers. The connection itself is secure because symmetric cryptography is used to encrypt the data transmitted. The keys are uniquely generated for each connection and are based on a shared secret negotiated at the beginning of the session, also known as a TLS handshake.

What is the impact to you? If you are using a modern and current browser such as Chrome, MS Edge, Safari and Firefox there should be no impact.

Web Browsers

In keeping with security best practices, York County 911 is requiring the use of current web browsers to ensure continued access to York County 911 web services.

Older web browsers use out-of-date protocols that do not support modern encryption and contain security vulnerabilities that can be exploited by attackers. Effective Thursday, March 30^th, 2023, only web browsers that support versions 1.2 or 1.3 of the TLS protocol will be permitted to access York County web services. Browsers that use TLS version 1.0 or 1.1 will not be supported. 

To ensure your web browser supports TLS 1.2 or 1.3, complete the steps below. 

Microsoft Edge

TLS 1.2 is automatically enabled in all versions of Microsoft Edge. 

Google Chrome

TLS 1.2 is automatically enabled in Google Chrome version 29 or greater.

• Ensure you are using the most recent version of Chrome ...  

Apple Safari

TLS 1.2 is automatically enabled in Safari version 7 or greater.

• Ensure you are using the most recent version of Safari ...  

Mozilla Firefox

TLS 1.2 is automatically enabled in Firefox version 27 or greater.

• Ensure you are using the most recent version of Firefox ...  

To enforce TLS version 1.3 in Firefox, complete the steps below. 

1. Open Firefox.

2. In the address bar, type about:config and press Enter.

3. In the Search field, enter tls. Find and double click the entry for security.tls.version.max.

4. Set the integer value to 4 to force a maximum protocol of TLS 1.3.

5. Click OK.

6. Close your browser and restart Mozilla Firefox.