ASA Database Administration Guide
Database Administration Utilities
The Compression utility
Compressing a database using the dbshrink command-line utility
Specify encryption key (-ek) This option allows you to specify the encryption key for strongly encrypted databases directly in the command. If you have a strongly encrypted database, you must provide the encryption key to use the database or transaction log in any way. For strongly encrypted databases, you must specify either -ek or -ep, but not both. The command will fail if you do not specify a key for a strongly encrypted database.
Prompt for encryption key (-ep) This option allows you to specify that you want to be prompted for the encryption key. This option causes a dialog box to appear, in which you enter the encryption key. It provides an extra measure of security by never allowing the encryption key to be seen in clear text. For strongly encrypted databases, you must specify either -ek or -ep, but not both. The command will fail if you do not specify a key for a strongly encrypted database.
Log output messages to file (-o) Write output messages to the named file.
Operate quietly (-q) Do not display output messages. This option is available only when you run this utility from the command prompt.
Operate without confirming actions (-y) Choosing this option automatically replaces existing compressed database file(s) without requesting confirmation.