@InProceedings{AF07,
    author     = {Masayuki Abe and Serge Fehr},
    title      = {Perfect {NIZK} with Adaptive Soundness},
    booktitle  = {Theory of Cryptography Conference - TCC~07},
    series     = {Lecture Notes in Computer Science},
    volume     = 4392,
    pages      = {118--136},
    year       = 2007,
    publisher  = {Springer-Verlag}
}