WebCrypto APIs: subtle.generateKey subtle.exportKey subtle.importKey subtle.deriveBits subtle.encrypt subtle.decrypt subtle.digest Algorithms: SHA-256 AES-GCM RSA_OAEP_256 PBKDF-2 (optional)
Ooh, WebKit just added it 4 weeks ago! http://trac.webkit.org/changeset/191235
Time for a Safari update!