Method and apparatus for the secure distributed storage and retrieval of information
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United States of America Patent
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-
Feb 20, 2001
Grant Date -
N/A
app pub date -
Jun 23, 1999
filing date -
Sep 12, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A solution to the general problem of Secure Storage and Retrieval of Information (SSRI) guarantees that also the process of storing the information is correct even when some processors fail. A user interacts with the storage system by depositing a file and receiving a proof that the deposit was correctly executed. The user interacts with a single distinguished processor called the gateway. The mechanism enables storage in the presence of both inactive and maliciously active faults, while maintaining (asymptotical) space optimailty. This mechanism is enhanced with the added requirement of confidentiality of information; i.e., that a collusion of processors should not be able to learn anything about the information. Also, in this case space optimality is preserved.
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