chapter_five.verify_signature_four.heading

chapter_five.verify_signature_four.paragraph_one

chapter_five.verify_signature_four.paragraph_two

pubkey = """0411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3"""