Does signing the app protect against tampering with the file?
<p>I'm not familiar with the idea of signing files, and I can't find a satisfactory answer so far, so I think I'd better ask:</p>

<p>What I want to know is when signing a binary file (for Android), does the signing tool assign some sort of checksum to the file so that when a hacker changed something in the apk file, the program would refuse to start because the checksum doesn't match. Does this mechanism exist in Android's signing tool?</p>

<p>Well, I understand when a hacker has the binary, he can disable anything he wants, including the checksum check. But the question is: Does Android's signing tool provide this level or protection in the first place?</p>

<p>Thank you for reading, and answering!</p>
