@inproceedings {217628, author = {Ingolf Becker and Simon Parkin and M. Angela Sasse}, title = {The Rewards and Costs of Stronger Passwords in a University: Linking Password Lifetime to Strength}, booktitle = {27th USENIX Security Symposium (USENIX Security 18)}, year = {2018}, isbn = {978-1-939133-04-5}, address = {Baltimore, MD}, pages = {239--253}, url = {https://www.usenix.org/conference/usenixsecurity18/presentation/becker}, publisher = {USENIX Association}, month = aug }