a

Rights Info w/ email addresses

Content KeyEncrypted with

the server’s

public key

Publishing

License

The Content of the File

(Text, Pictures, metadata, etc)

End User

Licenses

Content Key(big random number)

Rights for a

particular user

Encrypted

with the user’s

public key

Created when

file is protected

Only added to

the file after the

server licenses a

user to open it

Encrypted with

Content Key, a

cryptographically

secure 128-bit

AES symmetric

encryption key

Encrypted with

the server’s

public key

Encrypted

with the user’s

public key

Information Author Information Recipient

Rights

Management

Server

Database Server Directory Server

5/03/2007