# Method Nettle.ARCTWO()->State()->set_decrypt_key()

Method set_decrypt_key

  `State set_decrypt_key(string(8bit) key, void|int ekb)`

Description

  Initializes the object for decryption. The key memory will be cleared before released.

Parameter `ekb`

  The effective number of bits in the key.

  `UNDEFINED` | Derive from the key size (ie `8 * sizeof(key)`).
  `0` | Convenience alias for max (ie `1024`).
  `(1..1024)` | Reduce the effective key size to the specified number of bits.

See also

  set_encrypt_key, crypt