Information Technology Reference
In-Depth Information
Account Name
> Account > Mail > Advanced; for Exchange accounts, Settings > Mail,
Contacts, Calendars >
Account Name
> Account > Advanced Settings). Tap Sign, turn it on,
and tap the certificate you want to use.
In theory, every message you send from that account will be signed, but if you have multiple
accounts or addresses, it's easy to confuse Mail—so do yourself a favor and check two more
things:
• When composing a message, make sure the From address is the same as the ad-
dress on the certificate. If not, tap the Cc/Bcc, From line; tap the From address;
and then tap the correct address in the list.
• Make sure the
default
From address for the account also matches the certi-
ficate's address. (I know, that doesn't seem like it should be necessary, but in
my tests, signing failed if it wasn't the case.) To do this, go to Settings > Mail,
Contacts, Calendars >
Account Name
> Email (or, for iCloud, Settings > Mail,
Contacts, Calendars >
iCloud Account Name
> Account > Mail > Email) and se-
lect the address matching the certificate.
And
now
your outgoing messages from that account should be signed! Be sure to go back and
turn signing off when you want messages to stop being signed.
Turn On Encryption
What's true of signing is also true of encryption: You have to turn it on or off in Settings. Just
as you did for signing, go to Settings > Mail, Contacts, Calendars >
Account Name
> Account
> Advanced (or, for iCloud, Settings > Mail, Contacts, Calendars >
iCloud Account Name
>
Account > Mail > Advanced; for Exchange accounts, Settings > Mail, Contacts, Calendars >
Account Name
> Account > Advanced Settings). Tap Encrypt, turn it on, and tap the certific-
ate you want to use.
Note:
The certificate you choose here is actually used for
signing
encrypted messages,
not for encrypting them—that comes next.
However, there's another element, which is that to encrypt a message to someone, you need
that person's public key. So, whether Encrypt is turned on or not, Mail won't encrypt outgo-
ing messages unless the recipient's public key has been added to your iOS device's keychain.
The easiest way to get it is to ask the other person to send you a signed (but not encrypted)
message. Unlike Mail in Mavericks, Mail in iOS 7 doesn't grab certificates automatically from
signed messages you receive. To do this manually, tap the sender's name (marked with a
small seal icon ), tap View Certificate, tap Install, and then tap Done. Repeat
with any future signed messages you receive from other correspondents.
