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SecurityProtocolType Enumeration
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SecurityProtocolType Enumeration

Specifies the security protocols that are supported by the Schannel security package.

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

Namespace:  System.Net
Assembly:  System (in System.dll)

'Declaration
<FlagsAttribute> _
Public Enumeration SecurityProtocolType

Member nameDescription
Ssl3Specifies the Secure Socket Layer (SSL) 3.0 security protocol.

SSL 3.0 has been superseded by the Transport Layer Security (TLS) protocol and is provided for backward compatibility only.

TlsSpecifies the Transport Layer Security (TLS) 1.0 security protocol.

TLS assumes that a connection-oriented protocol, typically TCP, is in use. The TLS protocol is defined in IETF RFC 2246.

Tls11Specifies the Transport Layer Security (TLS) 1.1 security protocol.

TLS assumes that a connection-oriented protocol, typically TCP, is in use. The TLS 1.1 protocol is defined in IETF RFC 4346.

This value is supported on Windows 7 and later.

Tls12Specifies the Transport Layer Security (TLS) 1.2 security protocol.

TLS assumes that a connection-oriented protocol, typically TCP, is in use. The TLS 1.2 protocol is defined in IETF RFC 5246.

This value is supported on Windows 7 and later.

This enumeration defines permissible values for the SecurityProtocol property and specifies the security protocols that are used by instances of the SslStream class.

The following code example demonstrates creating a TcpClient that uses the SslStream class to communicate with a server.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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