Revocation of a system administrator in an encrypted file system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8150038
APP PUB NO 20090116649A1
SERIAL NO

11933701

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method of securely storing electronic information includes a step in which target electronically stored information is encrypted with a first encryption key and then partitioned into a first set of encrypted ESI partitions a subset of which is able to reconstruct the unpartitioned encrypted ESI. This first set of encrypted ESI partitions is then encrypted with a first set of user encryption keys to form a first set of user-associated encrypted ESI partitions that are made available to a first set of users. When access to the target electronically stored information is changed, the target electronically stored information is accessed and then re-encrypted with a second encryption key to form a second encrypted ESI. This second encrypted ESI is then partitioned and distributed to a second set of users.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ORACLE AMERICA, INC.SANTA CLARA, CA8364

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Perlman, Radia Sammamish, US 22 555

Cited Art Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
* 7778417 System and method for managing encrypted content using logical partitions 6 2005
* 2008/0130,890 ENHANCED DATA SECURITY WITH REDUNDANT INCLUSIVE DATA ENCRYPTION SEGMENTS 6 2006
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (4)
5261002 Method of issuance and revocation of certificates of authenticity used in public key networks and other systems 163 1992
5351295 Secure method of neighbor discovery over a multiaccess medium 38 1993
5483598 Message encryption using a hash function 48 1993
5475763 Method of deriving a per-message signature for a DSS or El Gamal encryption system 23 1994
 
INTEL CORPORATION (1)
* 2005/0108,534 Providing services to an open platform implementing subscriber identity module (SIM) capabilities 17 2003
 
INTELLECTUAL VENTURES I LLC (1)
* 8006280 Security system for generating keys from access rules in a decentralized manner and methods therefor 18 2002
 
EMC IP HOLDING COMPANY LLC (2)
5901227 Method and apparatus for implementing partial and complete optional key escrow 80 1996
5892828 User presence verification with single password across applications 66 1996
 
MICRON TECHNOLOGY, INC. (1)
* 7370166 Secure portable storage device 30 2005
 
SUN MICROSYSTEMS, INC. (2)
* 2002/0136,410 Method and apparatus for extinguishing ephemeral keys 36 2001
2003/0115,154 System and method for facilitating operator authentication 11 2001
 
ORACLE AMERICA, INC. (22)
6389532 Method and apparatus for using digital signatures to filter packets in a network 91 1998
6173400 Methods and systems for establishing a shared secret using an authentication token 120 1998
6230266 Authentication system and process 90 1999
6510523 Method and system for providing limited access privileges with an untrusted terminal 107 1999
6883100 Method and system for dynamic issuance of group certificates 30 1999
7213262 Method and system for proving membership in a nested group using chains of credentials 22 1999
6363480 Ephemeral decryptability 83 1999
6263434 Signed group criteria 25 1999
6912656 Method and apparatus for sending encrypted electronic mail through a distribution list exploder 28 1999
6804779 Hierarchical watermarking of content that is distributed via a network 49 2000
6546486 Content screening with end-to-end encryption within a firewall 11 2000
6560705 Content screening with end-to-end encryption prior to reaching a destination 17 2000
6636838 Content screening with end-to-end encryption 34 2000
7178021 Method and apparatus for using non-secure file servers for secure information storage 59 2000
7054905 Replacing an email attachment with an address specifying where the attachment is stored 99 2000
7058798 Method ans system for pro-active credential refreshing 19 2000
6996712 Data authentication system employing encrypted integrity blocks 24 2000
6975729 Method and apparatus for facilitating use of a pre-shared secret key with identity hiding 4 2000
7016499 Secure ephemeral decryptability 14 2001
2002/0191,797 Secure ephemeral decryptability 11 2001
* 7792300 Method and apparatus for re-encrypting data in a transaction-based secure storage system 21 2003
2007/0245,410 Method and apparatus for securely forgetting secrets 6 2006
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
8751789 General purpose distributed encrypted file system 0 2010
8788806 General purpose distributed encrypted file system 0 2012
* Cited By Examiner

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