# Other Type Definitions

The following type definitions are available globally.

### DEPRECATED - Supported Public Key Algorithm Keys

- `TSKSupportedAlgorithm`

  Deprecated

  Starting with TrustKit 1.6.0, key algorithms no longer need to be specified; remove TSKSupportedAlgorithm from your configuration.

  DEPRECATED since 1.6.0: this configuration key is no longer needed.

  A public key algorithm supported by TrustKit for generating the SSL pin for a certificate.

  #### Declaration

  Objective-C

      typedef NSString *TSKSupportedAlgorithm

  Swift

      typealias TSKSupportedAlgorithm = NSString