xenc:Syntax

<EncryptedData Id="" Type="">
  <EncryptionMethod/>?
  <ds:KeyInfo>?
   <enc:EncryptedKey/>?
   ...
  </ds:KeyInfo>?
  <CipherData URI="">iamscrambled</CipherData>
</EncryptedData>

• EncryptedKey is just like EncryptedData, but always carries a (session) key.