Patent ID: 9647992
Date: 2017-05-09
CPC Classifications: G06F,H04L

Claim:
1. A computer-implemented method of transferring content, performed on a source device having one or more processors and memory storing one or more programs which when executed by the one or more processors cause performance of the method, the method comprising: receiving from a target device, a target device signature; accessing a content file having encrypted content and a source-specific header allowing only a device having a source device signature access to the encrypted content, wherein the source device comprises a removable device having non-volatile semiconductor memory storing one or more content files; decrypting the encrypted content using a content key; removing source-specific information from the content; adding target-specific information to the content, wherein the source-specific information is one or more of a source watermark and source stenographic information; wherein the target-specific information is one or more of a target watermark and target stenographic information; wherein the source watermark and the source stenographic information include information unique only to the source; and wherein the target watermark and the target stenographic information include information unique only to the target; creating a new content key; encrypting the decrypted content with the new content key to create re-encrypted content; creating for the content file a target-specific header allowing only a device having the target device signature access to the content; encrypting the target-specific header; then transferring to the target device, the content file with the re-encrypted content, the new content key and the encrypted target-specific header.