My guess is that it enables easily switching UIDs and running apps without having to worry too much. If you're really curious you could backup your stuff, root your device, change the permissions, and see what happens =)
On Friday, April 12, 2013 5:59:09 AM UTC-5, George Kantid wrote: > > That is a great presentation, but unfortunately does not answer my > questions regarding permissions. > > > On Fri, Apr 12, 2013 at 12:15 AM, Jeffrey Walton > <[email protected]<javascript:> > > wrote: > >> On Thu, Apr 11, 2013 at 9:07 AM, George Kantid >> <[email protected]<javascript:>> >> wrote: >> > It seems that optimised dex files that are placed in /data/dalvik-cache >> upon >> > installation have -rw-r--r-- permissions (644). >> > >> > Is there a reason 'others' are allowed to read the files? How can >> optimised >> > dex files have 640 permissions? >> > >> > Same question applies to apks placed in the /data/app directory after >> > installation. >> > >> > Also, native libraries are now placed in /data/app-lib/myapp/ directory, >> > with all .so files having -rwxr-xr-x permissions. Why? >> Marko Gargenta discusses the directory structures and permissions in >> "Android Security Underpinnings from Android Builders Summit," >> http://www.youtube.com/watch?v=NS46492qyJ8. I'm not sure if he answers >> all your questions, though. >> >> Jeff >> > > -- You received this message because you are subscribed to the Google Groups "Android Security Discussions" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/android-security-discuss?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
