可引用的發言段落Citable transcript turn#167739講者:Speaker: David ChaumYes, that’s the basic idea, the invisible ink and then you fill the oval and that code is developed and then we prove that the published codes... 逐字稿導覽Transcript navigation查看前後文View context分享此段Share turn來源逐字稿Source record2018-04-07 Conversation with David Chaum