Ephorus is a plagiarism tool.
Cited from the Ephorus site https://www.ephorus.com/:
Ephorus identifies texts which include rearranged words, sentences or paragraphs. Even texts that have been altered do not pose a problem for Ephorus; the system sees through different formats quickly and efficiently. Plagiarism can be detected in any alphabet: Latin, Cyrillic, Arabic, Hebrew and Greek.
Ephorus can be used as a tool in Blackboard.
Manual to use Ephorus in Blackboard:
UvA campus licence for Ephorus changes in 2015 to Turnitin campus licence.