According to Google Executive Chairman Eric Schmidt, Google is “pretty sure” that your data is safe. Schmidt said this today at a panel discussion at South by Southwest Initiative.
Google upgraded the encryption process that they use to keep users information secure, and Google was apparently in the process of upgrading their system and encryption when the Edward Snowden revelations were first released. When that news broke, Google says that they expedited the process of upgrading.
Schmidt also said that Google was attacked by the Chinese in 2010, and by the NSA in 2013, but that he was “pretty sure” that the information held by Google is safe right now. According to Schmidt, Google is working hard to keep users information secure, but that once something is published on the Internet, it never really goes away.