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US 2008/0175391 A1Published application
Apparatus and method for cryptographic protection of directories and files
AssigneePGP Corporation
InventorsDavid FINKELSTEIN, William F. PRICE, Derek ATKINS, Harold FINNEY
Life of this patent
Estimating the term…
Abstract
A computer readable storage medium includes executable instructions to encrypt a file with a file encryption key to produce an encrypted file. The file encryption key is encrypted with a directory encryption key to produce an encrypted file encryption key. The directory encryption key is encrypted with a public key of a user within a group to produce an encrypted directory encryption key.
Claims18
A computer readable storage medium, comprising executable instructions to:
- encrypt a file with a file encryption key to produce an encrypted file;
- encrypt the file encryption key with a directory encryption key to produce an encrypted file encryption key;
- and
- encrypt the directory encryption key with a public key of a user within a group to produce an encrypted directory encryption key.
1 more element
A computer readable storage medium, comprising executable instructions to:
- generate a directory encryption key;
- generate file encryption keys for each file in a directory;
- select a file encryption key for each file in the directory;
- encrypt each file in the directory with a file encryption key;
- encrypt each file encryption key with the directory encryption key;
- and
- encrypt the directory encryption key with a public key.
4 more elements
Dependencies are inferred from the claim text.