Array ( [0] => Array ( [title] => L8AR [link] => https://www.youtube.com/embed/GvBuslvEZq8 ) [1] => Array ( [title] => L8BR [link] => https://www.youtube.com/embed/9Flbil_r2XQ ) [2] => Array ( [title] => L8CR [link] => https://www.youtube.com/embed/aFgJDvQgEFk ) [3] => Array ( [title] => L8DR [link] => https://www.youtube.com/embed/MHez_Omr9h0 ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第8講 Ch.3 Algebra & number theory basics (3).Ch.4 Public-key cryptography (1)