Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Configure an outgoing content filter. You need to configure a content filter to tag the outbound emails 
that should be encrypted. For instructions on creating the content filter, see 

The following web browsers are supported:

Microsoft® Internet Explorer 7 (Windows XP and Vista)

Microsoft® Internet Explorer 8 (Windows XP and Vista)

Firefox 3.0 and 3.5

Safari 4.0 (Mac OS X)

When using email encryption, the Cisco IronPort Email Security appliance encrypts a message and 
stores the message key on a local key server or a hosted key service. When the recipient opens an 
encrypted message, the recipient is authenticated by the key service, and the decrypted message is 
displayed. 

The basic workflow for opening encrypted messages is:

When you configure an encryption profile, you specify the parameters for message encryption. For an 
encrypted message, the Email Security appliance creates and stores a message key on a local key server 
or on the hosted key service (Cisco Registered Envelope Service). 

The recipient opens the secure envelope in a browser.

When a recipient opens an encrypted message in a browser, a password may be required to authenticate 
the recipient’s identity. The key server returns the encryption key associated with the message. 

1) Email Security appliance encrypts and 
stores message key in key server

Key Server or Hosted Key Service

Password

Key

2) User opens secure 
envelope in browser

4) Decrypted message is 
displayed.

3) User authenticates 
and gets message key.