The OPM hackers were certainly nation-state actors engaging in espionage and the data they stole included very detailed personal information that the foreign government could use to design very convincing spearphishing emails. Smartphones, by now ubiquitous in modern society, can store in encrypted form Social Security numbers, credit card numbers, billing addresses, birth dates, and other personal information traditionally kept in large, centralized databases. Such data includes Social Security Numbers, credit cards and other information which the hackers can use themselves or sell to others.”]