(Some mathematical knowledge related to information security, everyone has the right to expand their understanding of information security when learning some mathematics
Letters and Numbers Courseware\Information Security Mathematical Fundamentals First Lecture.ppt
Letters and Numbers Courseware\The Third Lecture.doc
Letters and Numbers Courseware\The Fifth Lecture.doc
Letters and Numbers Courseware\Lecture 6.doc
Letters and Numbers Courseware\The Fourth Lecture.doc
Letter number courseware\handout.doc)