Digitally Signing your e-mail Encrypting your e-mail Installing your own certificate Signing individual messages Automatically signing every outgoing message Encrypting individual messages Automatically encrypting every outgoing message Saving a Digital Certificate from a signed message Viewing and/or removing digital certificates in your address book Digitally Signing your e-mail. Outlook Express allows you two ways to configure signing of your messages:  Every time you send an e-mail (compose, reply to or forward a message)  Only when you ask for it by clicking on the sign button.  The process of digitally signing your email, requires the use of your private key. This key is needed to:  Prove the authenticity of each participant in an electronic communication Guarantee the integrity of the message content  Warrant the non-repudiation of the electronic communication  Therefore, the recipient of a digitally signed message can be sure that this message is coming from you and that you wrote what he or she is reading.  The process of signing a message does not protect the message from being intercepted and read by someone other than the recipient. To ensure that only the recipient can read the message, you must also encrypt the message.    Encrypting your e-mail. To insure the privacy and confidentiality of messages, they need to be encrypted.  The process of encrypting messages so that only the recipient can decrypt them, requires the use of the recipient's certificate (containing the public key) in your address book. To get the recipient's certificate you can ask him to send you a signed e-mail first (which will contain certificate and his or her public key), or you can find the certificate online from Comtrust public directory The use of the public key of the recipient in the encryption procedure guarantees the confidentiality of the message (you know the recipient is the only person who can read your message)    Installing your own certificate. When you receive your certificate, choose 'Tools' in Outlook Express and then 'Accounts':  Choose 'mail', and then click on 'properties' and afterward on 'security'  Select the 'Use a digital ID when sending secure messages from: name@mail-address'  Click on 'Digital ID' and choose the certificate you want to use Signing individual messages To sign an outgoing message: click on the 'digitally sign message' icon (envelope with red label)  in the message window.  On the lower right corner of the address pane appears the icon with the signature. If you click again on 'digitally sign message', the digital signature will disappear.    Automatically signing every outgoing message Select in Outlook Express, 'Options' in the 'Tools' menu.  Click on 'Security'.  Enable 'Digitally sign all outgoing messages'    Encrypting individual messages To encrypt an outgoing message, click on 'encrypt message' (envelope with a blue padlock) in the message window.  The icon 'encrypt' will appear on the lower right corner of the address pane showing that the message has been encrypted. If you click again on 'encrypt message', the encryption disappears.    Automatically encrypting every outgoing messages To automatically encrypt all messages if the recipient’s certificate is stored in your address book: configure your e-mail options so your outgoing messages will be automatically encrypted when the addressee's digital certificate resides in your address book:  Open Outlook Express  Select 'Options' in the 'tools' menu  Choose 'security'.  Click 'encrypt contents and attachments for all outgoing messages'.    Save a digital certificate from a signed message. When you receive an encrypted message, you can save the digital certificate of that person in your address book.  Open the signed message  Select 'properties' from the 'file' menu  Choose 'security'  Click the 'add to address book' button    Viewing and/or removing digital certificates in your address book Open the address of the person whose digital certificate you want to remove.  Choose 'digital IDs'  Select the certificate you want to remove or view Click on 'properties' to view or 'remove' to delete When you remove someone's digital certificate you can no longer send encrypted messages to that person.