[aerogear-dev] Querying encrypted data

One of the things that came up while discussing offline secure storage on Android was how to query encrypted data. The first ideas that I could think of were: 1) Load encrypted files/data/databases into memory, decrypt them, query them, return results and GC the decrypted data. 2) magical phonetic encryption 3) Include queryable decrypted metadata along with encrypted payloads. The payloads will not be queryable and only be decrypted if metadata matches the query. #1 has some benefits (easy to implement across platforms, doesn't require a lot of work) and some draw backs (large datasets would eat into available memory, whole dataset would be vulnerable to a VM attack). #2 is a placeholder for better ideas. #3 is interesting because it is a middle of the road approach. One of the options for implementation I thought of would be to annotate fields in the VO being stored as "privledged" and they would be the only ones encrypted/decrypted when an object is stored or loaded. wdyt?