The level of service you get will be much more authentic.

You have plenty of experience and know you could not work for decades and be fine but choose to love to help your clients and enjoy your craft.Being authentic and relaxed is very powerful.

As for security, these days there are many levels of authentication in place if the product is of any worth.The beauty of cloud products I find is that your data comes with you wherever and is accessible on your device anywhere you have an internet connection - data at your fingertips while you're on the go.

Remember to use two factor authentication to provide an almost bulletproof security.

IMHO the easiest and most definitive is for the owner and you get an authentic survey. 

Remember, people use Airbnb for not only a cheaper visit, but also a more authentic one.

@Allende Hernandez most RE professionals (realtors, home inspectors, etc) in our area use SUPRA (http://www.supraekey.com) which allows you to  authorize anyone who has a Supra FOB or their smartphone to authenticate.

., a mobile authentication company."

You then want to authentically acknowledge them by letting them know how smart they are and how much they already know about the opportunity that you are sharing with them.

Authentic, professional and targeted messaging.