@inproceedings{HJJKY97,
 author    = {Amir Herzberg and Markus Jakobsson and Stanisl\&\#322;aw Jarecki and Hugo Krawczyk and Moti Yung},
 title     = {Proactive public key and signature systems},
 booktitle = {CCS '97: Proceedings of the 4th ACM conference on Computer and communications security},
 year      = {1997},
 isbn      = {0-89791-912-2},
 pages     = {100--110},
 location  = {Zurich, Switzerland},
 doi       = {http://doi.acm.org/10.1145/266420.266442},
 publisher = {ACM Press},
 address   = {New York, NY, USA},
 }