Takuya Mishina Sachiko Yoshihama Michiharu Kudo Fine-Grained Sticky Provenance Architecture for Office Documents. 336-351 2007 conf/iwsec/2007 IWSEC http://dx.doi.org/10.1007/978-3-540-75651-4_23 db/conf/iwsec/iwsec2007.html#MishinaYK07