This upload contains the Auxiliary Materials i.e. surveys and answer datasets for our ACM SAC 2021 paper. Full paper reference: Borce Stojkovski, Gabriele Lenzini, and Vincent Koenig. 2021. “I personally relate it to the traffic light”: a user study on security & privacy indicators in a secure email system committed to privacy by default. In The 36th ACM/SIGAPP Symposium on Applied Computing (SAC ’21), March 22–26, 2021, Virtual Event, Republic of Korea. ACM, New York, NY, USA, Article 4, 10 pages. https://doi.org/10.1145/3412841.3441998 The research is supported by the Luxembourg National Research Fund through grant PRIDE15/10621687/SPsquared, and the project pEp Security SA / SnT “Protocols for Privacy Security Analysis”.