For example, vulnerable APIs were blamed for last year's Optus data breach, one of the largest ever in Australia, and the theft of personal information of 37 million U.S. customers from T-Mobile. Enter DevSecOps So, what is DevSecOps? DevSecOps (or DevOps Security) is an innovative approach to software development that integrates security from the outset and throughout all stages of the development lifecycle. DevSecOps ensures application security through continuous and automated processes and can also uncover vulnerabilities directly related to the management of access permissions.