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Secure key management for roaming protected content

  • US 9,853,812 B2
  • Filed: 09/17/2014
  • Issued: 12/26/2017
  • Est. Priority Date: 09/17/2014
  • Status: Active Grant
First Claim
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1. A method implemented in a first computing device, the method comprising:

  • protecting, by the first computing device, content using a data protection public key of a first data protection public/private key pair corresponding to an identity of a user of the first computing device;

    copying, by the first computing device, the protected content to cloud storage;

    obtaining, by the first computing device, a public key of a second public/private key pair of a second computing device from a key store in the cloud storage, the first and second computing devices being separate computing devices, the first and second computing devices and the key store being associated with a same user identity, the key store configured to store device public keys corresponding to multiple devices associated with the same user identity, the key store further configured to make the device public keys of the respective multiple devices available to other devices of the multiple devices associated with the same user identity by the other devices accessing the key store in the cloud storage;

    encrypting, by the first computing device, the data protection private key using the public key of the second computing device; and

    providing, by the first computing device, the encrypted data protection private key to the second computing device.

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