About NFCecret
This application allows you to store some of your "top secret" on NFC tags securely. The encrypted content in the tag written by this application won't be seen by any other applications. Unless you lose both your tags and phone, your data should be fine.
For example, I stick one of my tags to the side of a drawer in my work place. And put some work related password in it. Whenever I need it, I take out my phone and scan the tag.
The encryption uses AES, The Advanced Encryption Standard (AES) is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001. Different installations generate different keys with randomly generated password and salt. So everyone's key is different.
The application was fully tested with Mifare classic 1k.
The next version will allow key transfer.