<p>The authors developed a practicum in the cryptographic technology, an indispensable technology to guarantee information security in the upcoming IoT era. The practicum is composed of a lecture in a part of algebra and discrete mathematics that founds modern cryptography, hardware implementation of cryptographic algorithms, and the side-channel attack on cryptographic hardware. It aimed not only that students learned textbook knowledge of cryptographic algorithms but also they developed their knowledge of implementing cryptographic algorithms considering the threat of the side-channel attack through their experience implementing the algorithms on a commercial hardware and attacking them. The practicum was offered to the third- and fourth-year students, and most of them achieved the required goal of the practicum. They also realized improving their practical skills in the cryptographic technology according to their responses to the questionnaire.</p>