Computer-based systems for administering patterned passphrases

This disclosure describes computer-based techniques for administering a spoken patterned passphrase. A passphrase processing unit running on an administrator computer generates passphrase data for a secure system using acoustic data and video data representing a spoken phrase by a speaker. This passphrase includes a pattern of words or speech segments that are audible and words or speech segments that are inaudible. During authentication, a passphrase administration unit on the administrator computer receives acoustic and visual data of a spoken phrase by a person attempting to access the secure system and evaluates whether the spoken phrase includes the pattern of audible and inaudible words or speech segments associated with the account. In this way, the techniques discussed herein may enable the administrator computer to administer spoken passphrases with an additional degree of protection than a system that is limited to using linguistic or biometric content in passwords or passphrases.