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Updating applications using migration signatures

  • US 10,459,711 B2
  • Filed: 08/12/2008
  • Issued: 10/29/2019
  • Est. Priority Date: 08/12/2008
  • Status: Active Grant
First Claim
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1. A computer-implemented method for improving security by securely changing certificate information of an installed software application, the method comprising:

  • receiving an installation file to update the installed software application, wherein the installed software application is digitally signed with a first signature that certifies a previous application publisher, and further includes certificate information that identifies the previous application publisher, and wherein the installation file is digitally signed with at least a second signature that certifies a new application publisher;

    determining that the received installation file digitally signed with at least the second signature is further digitally signed with a migration signature that matches the first signature to confirm that the received installation file includes a valid update signed by the previous application publisher;

    updating the installed software application based on the determination that the received installation file is digitally signed with the migration signature that matches the first signature, wherein the updated software application is digitally signed with at least the second signature that certifies the new application publisher; and

    changing the certificate information that identifies the previous application publisher to updated certificate information that identifies the new application publisher, based on the determination that the received installation file is digitally signed with the migration signature that matches the first signature, such that valid updates to the updated software application can only be signed by the new application publisher.

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