https://www.brookings.edu/wp-content/uploads/2021/04/FP_20210405_china_cyber_power.pdf
https://www.washingtonpost.com/graphics/2020/world/national-security/cia-crypto-encryption-machines-espionage/?utm_campaign=b064de4ef1-EMAIL_CAMPAIGN_2020_02_12_05_47&utm_medium=email&utm_source=POLITICO.EU
https://www.ips-journal.eu/interviews/there-can-be-no-special-status-for-public-officials-7523/
https://www.europapolitik.ch/blog/innovation-braucht-vernetzung-mit-matthias-leuenberger