The Information Security Manual (ISM) is updated regularly. Below is a list of previous updates in downloadable zip files covering the last 24 months. ISM September 2022 (September 2022) 47.18 MB - zip ISM June 2022 (June 2022) 47.22 MB - zip ISM March 2022 (March 2022) 48.16 MB - zip ISM December 2021 (February 2022) 48.55 MB - zip ISM September 2021 (September 2021) 52.52 MB - zip ISM June 2021 (June 2021) 53.08 MB - zip ISM April 2021 (April 2021) 52.86 MB - zip ISM March 2021 (March 2021) 53.26 MB - zip ISM February 2021 (February 2021) 53.84 MB - zip ISM January 2021 (January 2021) 54.01 MB - zip ISM December 2020 (December 2020) 54.03 MB - zip