Has anyone observed this ?

1. before installation the apk file do a md5sum or sha1pass etc on it,
and it will report one value.
2. After installation pull the same file from /data/app/file.apk , and
do sha1pass and md5sum etc on it again.


1 and 2 output different values ?

I am highly curious why this happens ?

By unzipping the apks obtained, it seems that 2 png files that are
present in one copy are missing from the another ... .why ?


Can anyone point to the code piece which does this, or some
description of how it happens ?

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