Patent ID: 9471786
Filing Date: 2016-10-18
CPC Classification: G06F,H04L

Claim Text:
1. A method for dumping a confidential image on a trusted computer system, the method comprising: loading, by the trusted computer system, an encrypted client dumper image key onto a protected area on the trusted computer system; decrypting, by the trusted computer system, the encrypted client dumper image key to generate a client dumper image key in the protected area, with a private host key stored in the protected area; comparing, by the trusted computer system, the client dumper image key with a client image key in the protected area; determining, by the trusted computer system, whether the client dumper image key matches the client image key; loading, by the trusted computer system, an encrypted dumper including a client dump key onto a secure logical partition on the trusted computer system, in response to determining that the client dumper image key matches the client image key; decrypting, by the trusted computer system, with the client dumper image key, the encrypted dumper to generate a dumper including the client dump key; starting, by the trusted computer system, the dumper; generating, by the dumper, an encrypted dump by encrypting, with the client dump key, an image to be dumped in the secure logical partition; writing, by the dumper, the encrypted dump on a client dump device; wherein the protected area is in secure firmware of the trusted computer system, inaccessible by any program outside of the secure firmware, inaccessible by an operating system, and inaccessible by a user; wherein the client image key in the protected area is used to encrypt a boot image of a current operating system stored in the secure logical partition on the trusted computer system; wherein the encrypted client dumper image key is generated, with a public host key, by a client computer; wherein the encrypted dumper is generated, with the client dumper image key, by the client computer; and wherein the dumper is stored in an area of the secure logical partition which is reserved for the dumper.