Countering Concurrent Login Attacks in "Just Tap" Push-based Authentication: A Redesign and Usability Evaluations. - Jay Prakash; Clarice Chua Qing Yu; Tanvi Ravindra Thombre; Andrei Bytes; Mohammed Jubur; Nitesh Saxena; Lucienne Blessing; Jianying Zhou 001; Tony Q. S. Quek (EuroS&P, 2021)