Brian,

Thank you for the info.

>>Can anyone suggest a way to encrypt the contents of a memo field and to know if someone has tampered with the data (such as checksum, etc)?
>>
>>TIA.
>
>A pretty reliable data integrity check would be to store a MD5 or SHA-1 digest of the data.
>
>Even better is add a passphrase to the end of the data when running the hash so that even if someone tampers and tries to recreate the hash they won't be able to.