title: Change NFC tag to be read only
body: <p>Currently I am using the following app to write data into a NFC tag, <a href="https://play.google.com/store/apps/details?id=com.antares.nfc&amp;feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hbnRhcmVzLm5mYyJd" rel="nofollow">https://play.google.com/store/apps/details?id=com.antares.nfc&amp;feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hbnRhcmVzLm5mYyJd</a> ,as it allows me to specify the AAR of the tag. However, when I am writing the tag, I have found out an security issue, the data in the tag can be changed easily, therefore I would like to ask if it is possible to specific only some people can re-write the tag? Or in a simple way, lock the tag, so nobody can rewrite it after I am sure the data in the app is correct. I am still a beginner of using the NFC technology, and find it may become more popular in the future, therefore I would like to learn more about it.</p>