Your Android phone can now share files with any iPhone using a Quick Share QR code

Google is rolling out a new QR code sharing feature in Quick Share that lets Android users transfer files to iPhones without any extra app.
How-To Geek on MSN

I found the easiest way to encrypt files on Android (it takes just 30 seconds)

OpenKeychain makes file encryption on Android actually simple, so stop using cloud storage for sensitive data.