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HMACRIPEMD160 Constructor (Byte[])

Initializes a new instance of the HMACRIPEMD160 class with the specified key data.

Namespace:  System.Security.Cryptography
Assembly:  mscorlib (in mscorlib.dll)

public HMACRIPEMD160(
	byte[] key


Type: System.Byte[]

The secret key for HMACRIPEMD160 encryption. The key can be any length, but if it is more than 64 bytes long it is hashed (using SHA-1) to derive a 64-byte key. Therefore, the recommended size of the secret key is 64 bytes.


The key parameter is null.

HMACRIPEMD160 is a type of keyed hash algorithm that is constructed from the RIPEMD-160 hash function and used as a Hash-based Message Authentication Code (HMAC). The HMAC process mixes a secret key with the message data, hashes the result with the hash function, mixes that hash value with the secret key again, and then applies the hash function a second time. The output hash is 160 bytes in length.

For an example of how to use this constructor, see the HMACRIPEMD160 class.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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