We like to use encrypted email when we have sensitive conversations. One consistent annoyance we’ve found when we encrypt our messages, though, is that it reduces the usefulness of our mobile devices. We can see that we’ve received an encrypted message, but can’t read the message until we return to a desktop machine with access to the appropriate keypair.
Our mobile SMIME reader apps enable us to read these messages securely on our devices. Our iPhone/iPad app is now available in the App store. A version for Android phones is now available in the Android Market.
Secure Email Reader will delete the file from your mobile device after successfully importing the key material. Next time you see an smime.p7m or smime.p7s attachment in Mail or in your web mail client, just open it using Secure Email Reader. You’ll be able to decrypt it and access any attachments. Secure Email Reader for Android. Download mime format reader for free. Communication downloads - Mime Viewer by Korda Software and many more programs are available for instant and free download. S/MIME has long been the bastard stepchild of e-mail encryption, largely because it’s more complex to set up and keep up. However, Apple’s Mail programs on Mac OS and iOS both support it, as does Microsoft Outlook on Windows. There are plenty of S/MIME compatible mail programs. Setting up S/MIME for your Apple products isn’t that hard. S/MIME support for Outlook on the Web (OWA) used to be only available in Internet Explorer but it is now also possible to add this to Google Chrome and the new Microsoft Edge browser. This guide explains how you can manually install or deploy the Microsoft S/MIME Control for Outlook on the web. S/MIME Reader allows you to decrypt and read S/MIME encrypted emails (.p7m). The private keys are imported into the app. You can import several keys from diffrent certificate files.
Protecting your private keys
In order to read encrypted email on your phone, you naturally need to install your keypair on the device. While it’s conceptually very simple to do so, keeping your keys secure requires some care. First, you need to export your keypair from your desktop mail client into a PKCS#12 file. You’ll want to choose a very strong passphrase for this file, because anyone who has the file and can get your passphrase will be able to read your encrypted messages. Unfortunately, entering a very strong passphrase into the tiny keyboards that accompany mobile devices is (unsurprisingly) quite difficult. To assist with this, we’ve built a small utility for Mac and Windows that allows you to generate a QR code containing your passphrase, and enabled our mobile apps to read passphrases from this barcode. Our Barcode Generator utility even includes a random passphrase generator to help you choose a strong one. Since you’ll never need to type this passphrase manually, you can make it as complex as you like.
Getting Started
You need your private key on your device in order to read encrypted email. Installing these keys is a little bit different depending on the device you’re using.
| [Jump to iPhone/iPad] | [Jump to Android-based devices] |
Exporting your keys from the desktop
First, you’ll need to export your keypair to a PKCS#12 file. We recommend starting by launching Barcode Creator and generating a good strong passphrase. Barcode Generator will place the passphrase on the clipboard, display a QR code and allow you to print or save the QR code. Next, export your keys using the utility supplied with your mail reader, pasting the newly generated strong passphrase from the clipboard when prompted to enter a passphrase.
On Mac OS X, just launch Keychain Access, select your certificate and choose “Export.”
On Windows, find your certificates in Internet Options, select the one you want to export and click “Export…”.
On either platform, be certain to use either “PKCS#12” or “PFX” format.
Secure Email Reader for iOS
Once you have your key saved in a PKCS#12 file, use iTunes to share the file with the Secure Email Reader.
Then start the secure email reader and import the keys, scanning the barcode you saved when it requests a passphrase. If the import does not start when you launch Secure Email Reader, click the green plus sign icon in the bottom right hand corner of the main screen to start the import. Secure Email Reader will delete the file from your mobile device after successfully importing the key material.
That’s it! Next time you see an smime.p7m or smime.p7s attachment in Mail or in your web mail client, just open it using Secure Email Reader. You’ll be able to decrypt it and access any attachments.
Secure Email Reader for Android
Once you have your key saved in a PKCS#12 file, copy your key to the device’s storage, either using a USB cable, a bluetooth file transfer, or by connecting the SD card to your computer.
Then start the secure email reader and choose the keystore option from the menu. Tap import, and scan the bar code you saved when it requests a passphrase. You’ll then need to choose a passphrase you’ll enter every time you want to decrypt a message. We recommend using a bar code for this as well, and keeping it some place secure, like a wallet.
Step 1: Enter the passphrase you used to protect the .p12 file
Step 2: Enter the passphrase you’ll use when you decrypt email.
Step 2: Enter the passphrase you’ll use when you decrypt email.
That’s it! Next time you see an smime.p7m or smime.p7s attachment in Mail or in your web mail client, just open it using Secure Email Reader. You’ll be able to decrypt it and access any attachments.
-->Applies to
- Windows 10
- Windows 10 Mobile
S/MIME stands for Secure/Multipurpose Internet Mail Extensions, and provides an added layer of security for email sent to and from an Exchange ActiveSync (EAS) account. In Windows 10, S/MIME lets users encrypt outgoing messages and attachments so that only intended recipients who have a digital identification (ID), also known as a certificate, can read them. Users can digitally sign a message, which provides the recipients with a way to verify the identity of the sender and that the message hasn't been tampered with.
About message encryption
Users can send encrypted message to people in their organization and people outside their organization if they have their encryption certificates. However, users using Windows 10 Mail app can only read encrypted messages if the message is received on their Exchange account and they have corresponding decryption keys.
Encrypted messages can be read only by recipients who have a certificate. If you try to send an encrypted message to recipient(s) whose encryption certificate are not available, the app will prompt you to remove these recipients before sending the email.
About digital signatures
A digitally signed message reassures the recipient that the message hasn't been tampered with and verifies the identity of the sender. Recipients can only verify the digital signature if they’re using an email client that supports S/MIME.
Prerequisites
S/MIME is enabled for Exchange accounts (on-premises and Office 365). Users can’t use S/MIME signing and encryption with a personal account such as Outlook.com.
Valid Personal Information Exchange (PFX) certificates are installed on the device.
Choose S/MIME settings
On the device, perform the following steps: (add select certificate)
S/mime Reader Android
Open the Mail app. (In Windows 10 Mobile, the app is Outlook Mail.)
Open Settings by tapping the gear icon on a PC, or the ellipsis (...) and then the gear icon on a phone.
Tap Email security.
In Select an account, select the account for which you want to configure S/MIME options.
Make a certificate selection for digital signature and encryption.
- Select Automatically to let the app choose the certificate.
- Select Manually to specify the certificate yourself from the list of valid certificates on the device.
(Optional) Select Always sign with S/MIME, Always encrypt with S/MIME, or both, to automatically digitally sign or encrypt all outgoing messages.
Note: The option to sign or encrypt can be changed for individual messages, unless EAS policies prevent it.
Tap the back arrow.
Encrypt or sign individual messages
While composing a message, choose Options from the ribbon. On phone, Options can be accessed by tapping the ellipsis (...).
Use Sign and Encrypt icons to turn on digital signature and encryption for this message.
Read signed or encrypted messages
When you receive an encrypted message, the mail app will check whether there is a certificate available on your computer. If there is a certificate available, the message will be decrypted when you open it. If your certificate is stored on a smartcard, you will be prompted to insert the smartcard to read the message. Your smartcard may also require a PIN to access the certificate.
S Mime Reader Online
Install certificates from a received message
When you receive a signed email, the app provide feature to install corresponding encryption certificate on your device if the certificate is available. This certificate can then be used to send encrypted email to this person.
S 2fmime Reader Free
Open a signed email.
Tap or click the digital signature icon in the reading pane.
Tap Install.