1. Cloud Storage Security Survey Ryan Kiefer

2. Overview Google Drive Microsoft Cloud Drive Dropbox Paid-for alternatives 2

3. Google Drive Free - 15GB Email + uploaded files Extra storage available for subscription – Theoretically limited only by your budget drive.google.com – 128-bit RC4_128 with TLS 1.2 – SHA1 message authentication – ECDHE_ECDSA key exchange 3

4. Microsoft Sky Drive Free - 7GB Uploaded files Up to 207GB storage available skydrive.live.com – 128-bit AES_128_CBC with TLS 1.0 – SHA1 message authentication – RSA key exchange 4

5. Dropbox Free - 2GB Uploaded files Up to 100GB personal, 1000GB business storage available www.dropbox.com – 256-bit AES_256_CBC with TLS 1.2 – SHA1 message authentication – ECDHE_RSA key exchange 5

6. More Secure Alternatives Spideroak – Encrypts locally before upload, 2048-bit RSA authentication + 256-bit AES encryption Wuala – Encrypts locally before upload, 2048-bit RSA authentication, 256-bit AES encryption, 256-bit SHA integrity checks Several others with similar security 6

7. Conclusions Google Drive, Dropbox, Microsoft SkyDrive score on ubiquity, ease of use Alternative services score on more complete security 7