A digitally signed message lets your recipients verify your identity as the sender; an encrypted message offers an even higher level of security. To send signed messages, you must have a personal in your keychain. To send encrypted messages, the recipient’s certificate must be in your keychain. • In the Mail app on your Mac, choose File > New Message. • Move the pointer over the From field, click the pop-up menu that appears, then choose the for which you have a personal certificate in your keychain. ![]() Aug 8, 2013 - So to recap, you can encrypt folders and protect files on your Mac if you: Open Disk Utility (go to Finder > Applications > Utilities folder). Once there, go to the File and choose New > 'Disk Image from Folder.' (or type shift-command-N). Select the folder you want to encrypt, and then click Image. A Signed icon (containing a checkmark) in the message header indicates the message will be signed when you send it. • Address the message to recipients. An Encrypt (closed lock) icon appears next to the Signed icon if your keychain contains a personal certificate for every recipient; the icon indicates the message will be encrypted when you send it. If you don’t have a certificate for every recipient, you must send your message unencrypted. Click the Encrypt icon to replace the closed lock icon with an open lock icon. Some mailing lists reject digitally signed messages because the signature is treated as an attachment. To send the message unsigned, click the Signed icon in your message; an x replaces the checkmark. ![]() In the Mail app on your Mac, a Security field in the header area indicates whether a message is signed or encrypted. • A signed icon (a checkmark) appears in the header area of a signed message. To view the details, click the icon. Office for mac 2011 download free full version. • “Mac Office” is damaged and can’t be opened. If the message was altered after it was signed, Mail displays a warning that it can’t verify the message signature. • A lock icon appears in the header area of an encrypted message. If you have your private key in your keychain, the message is decrypted for viewing. Otherwise, Mail indicates it can’t decrypt the message. If you want to include encrypted messages when you search for messages in Mail, set the option in of Mail preferences. The option enables Mail to search individual words, even though the message is stored encrypted. Note: S/MIME may not be available for your account. In this article Setting up to use S/MIME encryption • Get a certificate. The first step to use S/MIME is to obtain a certificate, also called a digital ID, from your organization’s administrator. Your certificate may be stored on a smart card, or may be a file that you store on your computer. Follow the instructions provided by your administrator to use your certificate. • Install the S/MIME control. • If you do not have the S/MIME control installed, and receive an encrypted or digitally signed message, you’ll be prompted to install the control when you open the message. Alternatively, if you do not have the S/MIME control installed, you can create a new message and select more options > Message options and select Encrypt this message (S/MIME). You will then be prompted to install the S/MIME control. • When you’re prompted to run or save the file, select Run. • You may be prompted again to verify that you want to run the software. Select Run to continue the installation. Note: You will have to close and reopen Outlook Web App before you can use the S/MIME control. Encrypt and digitally sign outgoing messages How do I encrypt or digitally sign all messages? After you’ve installed the S/MIME control, you can go to the gear menu > S/MIME settings where you will find two options that you can select to digitally encrypt or digitally sign every message you send. • Select Encrypt contents and attachment of all messages I send to automatically encrypt all outgoing messages. • Select Add a digital signature to all messages I send to digitally sign all outgoing messages. Note: All outgoing messages include new messages, replies, and forwards. How do I encrypt individual messages? To add or remove digital encryption from an individual message that you’re composing: • Go to the top of the message and select more options > Message options. • Select or deselect Encrypt this message (S/MIME). If you encrypt an outgoing message and Outlook Web App can’t verify that all recipients can decrypt the message, you’ll see a notice warning you which recipients may not be able to read the encrypted message.
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