In early September, Erik Johnson, a security researcher, posted a series of long tweets for proctorio, an Arizona software company. Six weeks later, Johnson received email notification from twitter that three tweets had been deleted because proctorio claimed rights under the Digital Millennium Copyright Act (DMCA). < / P > < p > although remote monitoring software is nothing new, due to the popularity of covid-19, more and more schools begin to use remote monitoring software for students who take exams and tests at home. < / P > < p > but after students are forced to install the school’s monitoring software, exam administrators can also access students’ computers (including common peripherals such as cameras and microphones) to ensure that students do not have potential cheating. However, many students complain that the remote monitoring software itself is a big problem. For example, vice reported that the essential software can’t recognize darker skin tones and relies on a high-speed Internet connection, but many low-income families do not. Unfortunately, as long as any of these inspection measures does not meet the requirements, whether the students know it or not, it may lead to invalid test results. < / P > < p > in response to strong dissatisfaction, thousands of students in Washington and Florida have asked schools to stop using remote monitoring software, including proctorio, for reasons of confidentiality and security risks. < / P > < p > even so, proctorio, based in Scottsdale, Arizona, argues that its products are quite privacy friendly. Although students have to install the Chrome extension to take the test, they can remove it manually after the test. < / P > < p > unlike desktop software, most chrome extensions are easy to download, view, and verify their source code, as did curious Johnson. However, after publishing its findings on twitter, proctorio used DCMA rights to delete three of them. < / P > < p > it is reported that the deleted content describes how proctorio judges students’ potential cheating tendency. For example, after students “switch the network”, or the software detects “abnormal click” and “eye movement”, the system will “terminate” the student’s test. < / P > < p > in addition, a link to the code snippet of the proctorio Chrome extension (which Johnson posted to Pastebin), but is no longer accessible (Internet archives and time machine caches have been excluded). “In accordance with our copyright policy, we will respond to valid DCMA complaints from copyright owners (or authorized representatives),” a twitter spokesman told foreign media in an interview. However, Mike Olsen said in a telephone interview that the University of Miami had accepted the company’s user terms on behalf of students, and that Johnson’s Twitter messages had violated the terms. Google said the proposed media negotiation rules would put its free services in Australia at “risk”