Encrypt A String and make it secure even apk is extracted

Question

I want to save an unique String as variable in encrypted form and pass the variable as parameter to my PHP server in each request so that I can be sure that the request is coming from my android application not from other browsers..

I don't want others know my String even If my apk is extracted or became victim of reverse engineering. Is there any way to store a variable Like that way in encrypted form.

It would be helpful if you mention a process to Decrypt same variable with PHP.. Thanks in advance..

http://stackoverflow.com/questions/8397213/encrypt-and-decrypt-data-for-android-app-client — Lakhwinder Singh, Sep 29 '15 at 05:35

score 1 · Accepted Answer · answered Sep 29 '15 at 13:07

1

Encrypt A String and secure even apk is extracted

The only way to accomplish the question in the title is to use asymmetric cryptography (i.e. crypto_box_seal, which prevents the Android device from ever decrypting it).

so that I can be sure that the request is coming from my android application not from other browsers.

Impossible. Anyone can create a client that emulates your APK.

answered Sep 29 '15 at 13:07

Scott Arciszewski

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Thanks for ur answer. It was so helpful but I want to accomplish these kind of task to my android application not in php. I didn't meant that the string is to be prevented from android device. Android application can easily be extracted and source code can be seen. so I want to prevent the hacker from seeing my string value of the variable... anyway thanks again – Shree Krishna Oct 01 '15 at 04:34

Encrypt A String and make it secure even apk is extracted

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