The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 2010
Filed:
Sep. 06, 2006
Elena Daniela Cristofor, Redmond, WA (US);
Laurentiu Bogdan Cristofor, Redmond, WA (US);
Tanmoy Dutta, Redmond, WA (US);
Raul Garcia, Kirkland, WA (US);
Sung L. Hsueh, Redmond, WA (US);
Elena Daniela Cristofor, Redmond, WA (US);
Laurentiu Bogdan Cristofor, Redmond, WA (US);
Tanmoy Dutta, Redmond, WA (US);
Raul Garcia, Kirkland, WA (US);
Sung L. Hsueh, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
An indexing value may be determined, transparently with respect to a requester, based on a desired plaintext item of data and a cryptographic key. The indexing value may be used to access an entry in an indexing structure to obtain a corresponding database entry which includes a non-deterministically encrypted ciphertext item. In another embodiment, an indexing structure for a database may be accessed. Positions of items of the indexing structure may be based on corresponding plaintext items. References related to the corresponding plaintext items in the indexing structure may be encrypted and other information in the indexing structure may be unencrypted. A portion of the indexing structure may be loaded into a memory and at least one of the encrypted references related to one of the plaintext items may be decrypted. The decrypted reference may be used to access a corresponding non-deterministically encrypted data item from the database.