QuickTime 4 Reference

About Access Keys

Access keys make it possible to protect data. It allows an application that supplies data to register a password for the data with QuickTime and allows a user to enter the password to gain access to the data. For example, a codec can protect data it compresses with a password, so that it is available only to someone with the password. Similarly, the creator of a movie can require a password to view the movie.

Although most access keys are character strings, an access key can be of any data type.

System and Application Access Keys

Access Key Types