It stands for Secure Channel and is used by Microsoft Web Servers, including Windows Server 2003, Windows Server 2008, Windows 7, Windows Server 2008 R2 and others, including older ones like Windows XP and Windows NT even.Īnd after that you will see a bunch of error messages as in the title of this post like this. Schannel.dll is a library that is the main Microsoft TLS / SSL Security Provider. Restrict the use of certain cryptographic algorithms and protocols in Schannel.dll TLS 1.0 is no longer PCI-DSS compliant and the TLS working group has adopted a document to deprecate TLS 1.0 and TLS 1.1. These old versions of TLS rely on MD5 and SHA-1, both now broken, and contain other flaws. TLS 1.2 was published ten years ago to address weaknesses in TLS 1.0 and 1.1 and has enjoyed wide adoption since then. If you have disabled the deprecated server and client protocols TLS 1.0 and TLS 1.1 on your Windows Server as further down for security reasons.
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