File Encryption And Cloud Services

I can find documentation on using the File Encryption Services for local drives but nothing on the topic of Cloud Services. Does it work with DropBox, Box.com, Google Drive, SkyDrive Dollly Drive or any of the other Cloud Based services out there? Also what level of encryption is being used? AES, Salsa20, Twofish and what level of key encryption, i.e., 128, 256...?


Thanks.