In THE BOOK OF BILL, evil demon Bill writes a book about his life, his goals, and how he wants to kill people and take over the world. Set in the Gravity Falls universe, this collection of demon ...

In this paper, the original 5×5 matrix of PlayFair cipher has been extended to 10 × 10 PlayFair table, in order to maximize all possible characters that might be accepted using an ordinary QWERTY ...