This certificate acknowledges that Marek Kowalski has successfully completed the requirements and testing set forth by Cybrary and Cybrary's Educational Committee, demonstrating proficiency in Cryptography with a score of 78% and earning 4 CPE/CEU credit hours. The certificate is signed by Ralph P. Sita, CEO of Cybrary, and bears the certification number SC-3b12160c15-90916 and date of January 9, 2018.