Which method is not authorized for destruction of key tape?

The method of destruction that is not authorized for key tape is throwing it in regular trash. Key tapes contain sensitive information that, if not properly destroyed, could be accessed and compromised by unauthorized individuals. Proper destruction methods are critical in maintaining the confidentiality and integrity of communications security.

Shredding, burning, and disintegrating are all approved methods for destroying key tape, as they effectively eliminate the possibility of retrieving any potentially sensitive information. In contrast, throwing key tape in regular trash fails to ensure that the data is rendered irretrievable and compromises the security protocols that are essential in safeguarding classified information. This lack of secure disposal undermines COMSEC policies and can lead to potential breaches of sensitive data.