Locking and Unlocking Data in Encrypted Fields
Locking encrypted fields helps keep your data safer, since you have to first unlock the fields before viewing the data. After you lock encrypted fields, you can’t modify their contents until you unlock them.
To lock data in all encrypted fields:
In form view, select an encrypted field and click Triangle icon next to the field. Then select Lock Encrypted Fields. In table view, select an encrypted field and click the pop-up menu in the column header, then choose Lock Encrypted Fields.
A Lock icon appears next to all encrypted fields in form view, and bullets replace the contents of all encrypted fields.
Note  You can’t copy data from encrypted fields, and you can’t paste into encrypted fields when they are locked.
 
To unlock data in all encrypted fields:
1
In form view, select an encrypted field and click Triangle icon next to the field. Then select Unlock Encrypted Fields. In table view, select an encrypted field and click the pop-up menu in the column header, then choose Unlock Encrypted Fields.
2
A White eye icon appears next to all encrypted fields in form view.