The Information Security Manual (ISM) is updated regularly. Below is a list of previous updates in downloadable zip files. ISM September 2021 (September 2021) 51.88 MB .zip ISM June 2021 (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 ISM November 2020 (November 2020) 53.80 MB .zip ISM October 2020 (October 2020) 54.04 MB .zip ISM September 2020 (September 2020) 53.67 MB .zip ISM August 2020 (August 2020) 54.05 MB .zip ISM July 2020 (July 2020) 51.28 MB .zip ISM June 2020 (June 2020) 49.94 MB .zip ISM May 2020 (May 2020) 49.94 MB .zip ISM April 2020 (April 2020) 50.13 MB .zip ISM March 2020 (March 2020) 50.07 MB .zip ISM February 2020 (February 2020) 50.03 MB .zip ISM January 2020 (February 2020) 50.05 MB .zip ISM December 2019 (February 2020) 50.00 MB .zip ISM November 2019 (February 2020) 49.96 MB .zip ISM October 2019 (February 2020) 50.48 MB .zip ISM September 2019 (February 2020) 47.98 MB .zip ISM August 2019 (February 2020) 46.65 MB .zip ISM July 2019 (February 2020) 46.45 MB .zip ISM June 2019 (February 2020) 48.03 MB .zip ISM May 2019 (February 2020) 47.89 MB .zip ISM April 2019 (February 2020) 47.94 MB .zip ISM March 2019 (February 2020) 47.92 MB .zip ISM February 2019 (February 2020) 47.90 MB .zip ISM January 2019 (February 2020) 47.97 MB .zip ISM December 2018 (February 2020) 47.65 MB .zip ISM November 2018 (February 2020) 47.91 MB .zip
