クラウドコンピューティング
In 2012, prior to the Snowden leaks, he co-authored the "Note on privacy and Cloud computing", forewarning that the USA used European reliance on cloud computing services to monitor its data. After Snowden's disclosures vindicated him, he criticised PRISM, stating he had suspected the existence of the project during his time at Microsoft, although he had not known it by name.