Protocol Flags

The following are predefined constants for cryptography protocols. These values are defined in Wincrypt.h.

Constant/value	Description
CRYPT_FLAG_IPSEC 0x0010	Internet protocol security (IPsec) protocol.
CRYPT_FLAG_PCT1 0x0001	Private communications transport (PCT) version 1 protocol.
CRYPT_FLAG_SIGNING 0x0020	Signing protocol.
CRYPT_FLAG_SSL2 0x0002	Secure sockets layer (SSL) version 2 protocol.
CRYPT_FLAG_SSL3 0x0004	SSL version 3 protocol.
CRYPT_FLAG_TLS1 0x0008	Transport layer security (TLS) version 1 protocol.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	Wincrypt.h