"Booklets for the redesigned exam leaked online within days of the test. The ongoing failures to secure the SAT are prompting some college officials to question the validity of exam scores."
CC gets mentioned in passing. Looks like College Board has a major issue to deal with, and that improved technology is the only solution. Obviously, single-use tests are essential. But, as long as the exact same tests are administered across the globe in different time zones, leakage will be a problem.
Certification tests for companies like Microsoft and Cisco have used randomized tests offered on-demand electronically for many years. That would be a huge change and would require major infrastructure investment, but it would avoid test-leaking scandals like this one.
It probably wouldn't work for TCB, but language instruction firm Duolingo is allowing people to take tests on their own device. They reduce cheating by monitoring the test taker in real time from a central proctor who views the device's front-facing cam. One proctor can monitor multiple test-takers.