Windows and Supported TLS Versions

SocketTools uses the Microsoft CryptoAPI and Schannel security package to implement support for secure connections using TLS. Which versions of TLS are available will depend on the version of the operating system you are using.

SocketTools automatically handles the differences between the operating systems in terms of functionality and which security APIs are available. However, the highest version of TLS your application can negotiate is constrained by the operating system. The following table lists the supported versions of TLS for each version of Windows.

Windows Desktop Minimum Build TLS 1.0 TLS 1.2* TLS 1.3
Windows XP 2600 (SP3) 🞬 🞬
Windows Vista 6002 (SP2) 🞬 🞬
Windows 7 7601 (SP1) 🞬
Windows 8 9200 🞬
Windows 8.1 9600 🞬
Windows 10 18362 (1903) 🞬
Windows 11 22000 (21H2)
Windows Server
Windows Server 2003 3790 🞬 🞬
Windows Server 2003 R2 3790 🞬 🞬
Windows Server 2008 6003 🞬 🞬
Windows Server 2008 R2 7601 🞬
Windows Server 2012 9200 🞬
Windows Server 2012 R2 9600 🞬
Windows Server 2016 14393 🞬
Windows Server 2019 18362 (1903) 🞬
Windows Server 2022 20348

* Operating system support for TLS 1.2 also includes TLS 1.1.

Windows 7 and Windows Server 2008 R2 are the minimum supported platforms for secure connections. Because most servers today will reject connections which attempt to use TLS 1.0 or TLS 1.1, secure connections will fail on unsupported versions of Windows. For the highest level of security, we recommend using Windows 10 or later versions.

Windows TLS 1.3 Support

SocketTools supports TLS 1.3 on Windows 11 Build 22000 (21H2) and Windows Server 2022 Build 20384 or later versions. On older versions of Windows which don't provide support for TLS 1.3 using Schannel, SocketTools will fall back to using TLS 1.2. If your application requires support for TLS 1.3, it is recommended you use the current build of Windows 11 or Windows Server 2022.

See Also

SocketTools System Requirements
Support for TLS 1.2 on Windows XP
Support for TLS 1.0 and PCI Compliance

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