@inproceedings {268260, author = {Xin Liu and Ang Li and Xiaowei Yang and David Wetherall}, title = {Passport: Secure and Adoptable Source Authentication}, booktitle = {5th USENIX Symposium on Networked Systems Design and Implementation (NSDI 08)}, year = {2008}, address = {San Francisco, CA}, url = {https://www.usenix.org/conference/nsdi-08/passport-secure-and-adoptable-source-authentication}, publisher = {USENIX Association}, month = apr }