Patent Number: 7,047,420

Title: Exclusive encryption

Abstract: An exclusive encryption system is established using multiple computing devices. The exclusive encryption system allows for the exclusion of certain plaintext (e.g., by one of the computing devices) and ciphertext (e.g., by another of the computing devices) while at the same time maintaining the privacy created by the encryption (e.g., so the other computing device cannot see the plaintext). The exclusive encryption system may be implemented as part of a serverless distributed file system with directory entries (e.g., file names or folder names) being the plaintext, or alternatively as part of other systems.

Inventors: Douceur; John R. (Bellevue, WA), Benaloh; Josh D. (Redmond, WA), Yuval; Gideon A. (Mercer Island, WA), Adya; Atul (Bellevue, WA)

Assignee: Microsoft Corporation

International Classification: G06F 11/30 (20060101); G06F 1/26 (20060101); G06F 1/28 (20060101); G06F 12/14 (20060101); H04L 9/32 (20060101)

Expiration Date: 5/16/02018