Welcome to our school on Applied Cryptography, the first IACR Cryptology School in Thailand. The school will be held from 30 January to 3 February 2023 at the Department of Computer Engineering, Chulalongkorn University. Topics include both mathematical and engineering aspects of cryptographic algorithms, ranging from secure constructions of cryptographic schemes to secure implementations, including protections against implementation attacks. There will also be lab activities to enhance hand-on experience. The school welcomes highly motivated Master, early PhD, and advanced undergraduate students!