Encrypted Text

Appian Documentation says "Since the value is encrypted before it can be acted upon by a validation expression, no validation beyond checking for requiredness is possible with this component. For example, it is not possible to write an expression that validates that an id number matches the form xxx-xx-xxxx, nor is it possible to compare to values of type Encrypted Text to determine if they are equal.". I think there is no direct way to do this.