Selective shredding in a deduplication system
AssigneeEMC Corporation
InventorChristopher R. Lumb
Life of this patent
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Abstract
Making a target file impratical to be retrieved comprises decrypting a directory manager file using a first directory manager file key. The directory manager file includes an encryption key for a segment that is used when reconstructing a target file. The directory manager file is modified by deleting a reference to the target file. The reference includes a file encryption key. Retrieving the target file is made impractical by the deletion of the reference to the target file in the directory manager file. The modified directory manager file is encrypted using a second directory manager file key.
Claims24
A system for making a target file impractical to be retrieved, comprising:
- a processor configured to:
- decrypt a directory manager file using a first directory manager file key, wherein the directory manager file includes an encryption key for a segment that is used when reconstructing a target file;
- modify the directory manager file by deleting a reference to the target file, wherein the reference includes a target file encryption key, and whereby retrieving the target file is made impractical by the deletion of the reference to the target file in the directory manager file;
- and
- encrypt the modified directory manager file using a second directory manager file key.
A method for making a target file impractical to be retrieved, comprising:
- decrypting, using a processor, a directory manager file using a first directory manager file key, wherein the directory manager file includes an encryption key for a segment that is used when reconstructing a target file;
- modifying the directory manager file by deleting a reference to the target file, wherein the reference includes a target file encryption key, and whereby retrieving the target file is made impractical by the deletion of the reference to the target file in the directory manager file;
- and
- encrypting the modified directory manager file using a second directory manager file key.
A computer program product for making a target file impractical to be retrieved, the computer program product being embodied in a computer readable medium and comprising computer instructions for:
- decrypting a directory manager file using a first directory manager file key, wherein the directory manager file includes an encryption key for a segment that is used when reconstructing a target file;
- modifying the directory manager file by deleting a reference to the target file, is wherein the reference includes a target file encryption key;
- and
- encrypting the modified directory manager file using a second directory manager file key.
Dependencies are inferred from the claim text.