TLS Protocol Compatibility

Feb 17, 2025

TLS Protocol Compatibility

Introduction

This article focuses specifically on TLS v1.0, v1.1, v1.2, & v1.3 and their compatibility with various software platforms and operating systems, both client and server side, if you would like to know more about what these protocols are & what purpose they serve, please feel free to read on our blog post here. 

Note: Please note that certificates are not dependent on the protocols you have enabled or disabled, the protocols are determined by your server configuration and not by the certificates and will likely be managed by your server administrator or the appropriate IT staff within your organization. If you would like some further guidance on how you can go about disabling deprecated SSL/TLS protocols, please check our related article. 

Timeline

Compatibility Tables

INDEX: 

1. Browsers
2. Desktop Clients
3. Mobile Clients
4. Servers
5. Libraries

Browsers

Desktop Clients

Mobile Clients

Note 1: For desktop IE versions: 8, 9, and 10 are only compatible with TLS 1.1 and TLS 1.2 when running Windows 7 or newer, but it is disabled by default. To enable it, please check the guidelines found here for more information. 

Note 2: For Firefox 23 to 26: use about:config to enable TLS 1.1 and TLS 1.2 by updating the security.tls.version.max config value to 2 for TLS 1.1 or 3 for TLS 1.2. 

Note 3: For Google Chrome 22 to 37: TLS 1.1 and TLS 1.2 are compatible when running on Windows XP SP3, Vista, or newer (desktop), OS X 10.6 (Snow Leopard) or newer (desktop), or Android 2.3 (Gingerbread) or newer (mobile). 

Note 4: For Android 4.4: it may be compatible with TLS 1.1 and TLS 1.2 but some devices with Android 4.4.x may not support TLS 1.1 or higher.

Note 5: For Windows 8: TLS 1.1 and TLS 1.2 can be enabled by following the guidelines found here for more information.

Servers

Libraries

 Note 6: A Server that does not support TLS 1.1 and TLS 1.2 that connects to another site as a Client can support TLS 1.1 and TLS 1.2 by enabling it through the Internet Options in IE. Browse to Tools > Internet Options > Advanced. Under the Security section, you would see the list of SSL Protocols supported by IE. Tick the necessary boxes. You can check the guidelines found here for more information. 

Note 7: For Windows Server 2012: TLS 1.1 and TLS 1.2 can be enabled by following the guidelines found here for more information.
 

Note 8: For .NET 4.5 to 4.5.2: TLS 1.1 and TLS 1.2 can be enabled by following either one of the two options indicated below: Option 1:.NET applications may directly enable TLS 1.1 and TLS 1.2 in their software code by setting System.Net.ServicePointManager.SecurityProtocol to enable SecurityProtocolType.Tls12 and SecurityProtocolType.Tls11. The following C# code is an example:

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

Option 2:
To enable TLS 1.2 by default without modifying the source code by setting the SchUseStrongCrypto DWORD value in the following two registry keys to 1, creating them if they don't exist: "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319" and "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319". Although the version number in those registry keys is 4.0.30319, the .NET 4.5, 4.5.1, and 4.5.2 frameworks also use these values. Those registry keys, however, will enable TLS 1.2 by default in all installed .NET 4.0, 4.5, 4.5.1, and 4.5.2 applications on that system. It is thus advisable to test this change before deploying it to your production servers. 

Note 9: To enable TLS 1.2 by default, it is possible to install .NET Framework 4.5, or a newer version, and set the SchUseStrongCrypto DWORD value in the following two registry keys to 1, creating them if they don't exist: "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319" and "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319". Those registry keys, however, may enable TLS 1.2 by default in all installed .NET 4.0, 4.5, 4.5.1, and 4.5.2 applications on that system. We recommend testing this change before deploying it to your production servers. 

Note 10: The update needed to enable TLS 1.1 and TLS 1.2 as a default secure protocols in WinHTTP in Windows is indicated in the guidelines found here. 

We hope you found the information in this article useful, if you are unsure what protocols your server currently supports, you can use our free configuration checker here https://globalsign.ssllabs.com/ to quickly test your server and see which protocols are enabled. 

References

1. PCI Data Security Standard
2. PCI Security Standards Council Revises Date For Migrating Off Vulnerable SSL and Early TLS Encryption
3. Are You Ready for 30 June 2018? Saying Goodbye to SSL/early TLS
4. Migrating from SSL and Early TLS