Open-source software
Open-source software to decrypt content scrambled with the Content Scrambling System presents an intractable problem with the application of this law. Because the decryption is necessary to achieve interoperability of open source operating systems with proprietary operating systems, the circumvention is protected by the Act. However, the nature of open source software makes the decryption techniques available to those who wish to violate copyright laws. Consequently, the exception for interoperability effectively swallows the rule against circumvention.