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System.Net.Security.dll

System.Net.Security file version info

Library on Windows 1 known copy with hashes

Is it the real System.Net.Security.dll?

file version info and known copies
Installed inC:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\Facades\
Signed byMicrosoft Corporation
ProductMicrosoft .NET Framework, Microsoft Corporation
DescriptionSystem.Net.Security

1 known copy

4.8.4084.0 · C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\Facades\System.Net.Security.dll · signed by Microsoft Corporation

8f4a377d1c61ce90437721a1fe7d6ccea8c478aece646ab585d0f2c557bc5b72

From the file’s version info and the copies recorded by xCyclopedia (MIT). A copy in another folder, signed by someone else or with another hash is not necessarily malicious, but it is worth a closer look. In Ceplin, "<sha256>".whatis() says which known copy a hash is.