CryptographyHelperEncryptAes256CbcHkdfHmac Method

HKDF-based authenticated encryption using AES-256-CBC + HMAC (encrypt-then-MAC). Uses HKDF (HMAC-based Key Derivation Function) for per-message key separation. Features: Random salt, domain separation, version byte, and constant-time HMAC verification.

public static string EncryptAes256CbcHkdfHmac(
	string plaintext,
	string masterKey
)

Public Shared Function EncryptAes256CbcHkdfHmac ( 
	plaintext As String,
	masterKey As String
) As String