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Sending secure email attachments (upto 10MB per email)

Sending information via e-mail attachment is quick and easy but is open to the risk that someone other than the intended recipient can intercept it. This can be a serious problem if the information contained within the attachment is sensitive or confidential. To help you keep the contents of your e-mails secure, below are some instructions on how to encrypt one or more files so that you can send it safely.

Encrypting and emailing your file(s)
To increase the level of security, we also suggest that you encrypt the file before sending it via email. Encryption is a software tool that uses "scrambling" to make data unreadable. Once a message is encrypted, it will appear as a meaningless garble of characters to anyone except the person who has the password to unscramble it.

Your Microsoft Windows 10 has a build-in file encryption feature in File Explorer.

Follow the steps below:
(If you have multiple files to send, you can first create a folder and copy all files into this newly created folder. You can then select and encrypt the folder instead of individual files.)
- Launch 'File Explorer' using the Start menu (Start - Windows System - File Explorer).
- In the 'File Explorer' locate the file/folder that you want to encrypt.
- Once you have located the file/folder you want to encrypt, select it by clicking it once.
- With the file highlighted, right click and select 'Compress and email'.
- This will open a new window called 'Archive name and parameters'.
- Select 'Archive Format' to 'Zip' or 'RAR'.
- The 'Archive name" defaults to the same name as your original file with 'Zip' or 'RAR' file extension. You can change it to a different name if you want.
- At the bottom of the right, click 'Set password...'.
- This will open a new window called 'Enter password', where you can setup your own secure password. Click 'OK' when done.
- Verify all the information and click 'OK' to proceed with encryption and emailing.
You can now send the file/folder as an email attachment but remember not to include the password in the same email.

Opening an encrypted file
To open an encrypted file via email attachment you will need to know password for the encrypted file. Enter the password when prompted by 'File Explorer'.

Best Practices
Make passwords hard to guess (6-12 characters in length, at least one capital letter and at least one symbol).
NEVER send out passwords in the same email as the encrypted file(s).
Always confirm the identity of the recipient before releasing passwords.
Inform recipients of passwords either face to face, by telephone or in a separate email.