I'm looking to store on my Nexus 10 a few text files that contain sensitive data. I'm hoping some of you grognards can suggest an appropriate app. I've tried looking around in Google Play but everything seems either too complex (like EDS) or just a password manager (like NS Wallet). What I need is something that will allow me to encrypt and decrypt an imported .txt file and have it readable on the N10. Thanks for any help you can give!