Field encryption

Hi all,
 
Does anyone know of a function/routine to encrypt data in BDL?
Preferably, I'd like to make use of one of the more popular encryption
standards in use today. 
 
Basically, I want to let the user key in a text value on a screen form
then, when they save the record, I want to take the entered data and run
it through an encryption algorithm.  The encrypted data would be what we
store in the database.  When the user views this record at a later date,
we need to do the opposite, take the encrypted value from the database,
decrypt it, then display the decrypted value on the screen.
 
Thanks for the info,
 
Richard