Cryptography and coding : 18th IMA international conference IMACC 2021 virtual event December 14 15 2021 : proceedings Serious Games Applications Serious Game to Improve Literacy Technology used for Serious Games Serious Game Usage; Serious Games Design. This book constitutes the refereed proceedings of the 18th IMA International Conference on Cryptography and Coding IMACC 2021 held in December 2021. Due to COVID 19 pandemic the conference was held virtually. The 14 papers presented were carefully reviewed and selected from 30 submissions. The conference focuses on a diverse set of topics both in cryptography and coding theory