Things like measuring and reducing attack surface, self-defending data, damage-potential effort ratios, fully homomorphic encryption, and end-to-end message confidentiality.
CryptDB works by turning data into "homomorphic" information: strings of numbers, which you can then calculate against one another to get the answers you require.
Just as homomorphic encryption allows people to aggregate two functions without knowing the original input, new data mining technologies may allow meaningful statistical results without access to original raw user data.