This book includes extended and revised versions of selected papers from the 7th and 8th edition of the International Conference on Information Systems Security and Privacy (ICISSP 2021 and ICISSP 2022). ICISSP 2021 and 2022 was held as an online event due to the Covid-19 pandemic, from February 11-13, 2021 and February 9-11, 2022. respectively. The 6 full papers included in this book were carefully reviewed and selected from 217 submissions. The ICISSP 2021 and 2022 book contains extended and revised version of proceedings papers dealing with information systems security and privacy.