title: Android .SF file
body: <p>I want to know what are the differences between a MANIFEST.MF file and a .SF file in the Android context.</p>
  
  <p>As I can see, MANIFEST.MF file has the sha1 digest of each source file of an Android .apk.</p>
  
  <p>However .SF also lists all sources and computes a SHA1 digest. On what is this digest value computed??</p>
  
  <p>Any ideas?</p>
  
  <p>Also how to view a .RSA(Signature block file)?</p>
  
  <p>Thanks in advance</p>