In BlackBerry 10, there is an option for importing PGP keys under Security & Privacy. But to import the secret keys exported by GnuPG, you need to append the public key in the exported private key armored file. Then PGP will import fine. As per the documentation, you will be able to encrypt, decrypt from hub if you have active sync or Lotus Notes only. So for personal keys with IMAP account, a great alternative is to sideload OpenKeychain android app. Import your exported .asc private key. To decrypt a received email, copy the content, tap share and choose decrypt. Similarly, you can encrypt and share. Unfortunately there is no direct hub integration. Quick UI tip for Passport, swipe down from top and tap Size. Choose Zoomed out Full Screen option (middle one) for better experience. Most android apps looks great with this option.