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Often, whole careers hinge upon the passing or failing of a high stakes test. If a test or exam is to be truly meaningful, it is of course imperative that the most rigorous security is applied at every stage, to ensure that candidates are who they say they are, and that their performance in the test is based solely on their own efforts rather than on cheating.
The number one threat to test security is test content theft, whereby the test taker memorises as much of the test content as they can and then makes it available, for example by publishing it on the internet, frequently for commercial gain. A second significant threat is proxy testing, also known as test fraud though impersonation: where the test taker gains an unfair advantage by hiring someone else to take their test for them.
This is an important matter to training providers too. If the certification standard is compromised, then so too is the value in training for that certification. If it were possible to pass a test via some illicit shortcut, then of course fewer people would pay for training.
Thankfully, much technology exists to ensure security for the whole lifecycle of a test. From the creation of the items (questions or tasks) and their use in exams, through the delivery at the test centre, to forensic analysis of exam results, there are proven procedures to make sure content does not fall into the wrong hands or risk being misused.