You might be surprised to know that your mobile (cell phone) device may be the new airline boarding pass. It’s an interesting concept, but I’m a bit skeptic about the security issues that this could have.
As stated on Air Canada‘s website:
Introducing a new and efficient way to improve your flying experience,
from the moment you check-in using your mobile device, to boarding. Our enhanced Mobile Check-in service now offers a paperless Mobile boarding pass. Making your flying experience quicker and easier by proceeding directly to the security check point. This enhanced Mobile check-in service has certain restrictions, if the restrictions do not apply, you can still use our regular Mobile Check-in service.
Read more here.