@inproceedings {271563, author = {Alma Whitten and J. D. Tygar}, title = {Why Johnny Can{\textquoteright}t Encrypt: A Usability Evaluation of {PGP} 5.0}, booktitle = {8th USENIX Security Symposium (USENIX Security 99)}, year = {1999}, address = {Washington, D.C.}, url = {https://www.usenix.org/conference/8th-usenix-security-symposium/why-johnny-cant-encrypt-usability-evaluation-pgp-50}, publisher = {USENIX Association}, month = aug }