US Patent No: 8,150,038

Number of patents in Portfolio can not be more than 2000

Revocation of a system administrator in an encrypted file system

ALSO PUBLISHED AS: 20090116649
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ATTORNEY / AGENT: (SPONSORED)

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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, CA1741
SUN MICROSYSTEMS, INC.SANTA CLARA, CA9275

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Perlman, Radia Acton, MA 17 451

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SUN MICROSYSTEMS, INC. (24)
6,389,532 Method and apparatus for using digital signatures to filter packets in a network 76 1998
6,173,400 Methods and systems for establishing a shared secret using an authentication token 87 1998
6,230,266 Authentication system and process 82 1999
6,510,523 Method and system for providing limited access privileges with an untrusted terminal 94 1999
6,883,100 Method and system for dynamic issuance of group certificates 19 1999
7,213,262 Method and system for proving membership in a nested group using chains of credentials 13 1999
6,363,480 Ephemeral decryptability 66 1999
6,263,434 Signed group criteria 23 1999
6,912,656 Method and apparatus for sending encrypted electronic mail through a distribution list exploder 19 1999
6,804,779 Hierarchical watermarking of content that is distributed via a network 40 2000
6,546,486 Content screening with end-to-end encryption within a firewall 9 2000
6,560,705 Content screening with end-to-end encryption prior to reaching a destination 10 2000
6,636,838 Content screening with end-to-end encryption 23 2000
7,178,021 Method and apparatus for using non-secure file servers for secure information storage 18 2000
7,054,905 Replacing an email attachment with an address specifying where the attachment is stored 74 2000
7,058,798 Method ans system for pro-active credential refreshing 16 2000
6,996,712 Data authentication system employing encrypted integrity blocks 21 2000
6,975,729 Method and apparatus for facilitating use of a pre-shared secret key with identity hiding 4 2000
2002/0136,410 Method and apparatus for extinguishing ephemeral keys 30 2001
2002/0191,797 Secure ephemeral decryptability 6 2001
7,016,499 Secure ephemeral decryptability 9 2001
2003/0115,154 System and method for facilitating operator authentication 8 2001
7,792,300 Method and apparatus for re-encrypting data in a transaction-based secure storage system 9 2003
2007/0245,410 Method and apparatus for securely forgetting secrets 6 2006
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (4)
5,261,002 Method of issuance and revocation of certificates of authenticity used in public key networks and other systems 149 1992
5,351,295 Secure method of neighbor discovery over a multiaccess medium 33 1993
5,483,598 Message encryption using a hash function 41 1993
5,475,763 Method of deriving a per-message signature for a DSS or El Gamal encryption system 23 1994
 
EMC CORPORATION (2)
5,901,227 Method and apparatus for implementing partial and complete optional key escrow 78 1996
5,892,828 User presence verification with single password across applications 59 1996
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
7,778,417 System and method for managing encrypted content using logical partitions 4 2005
2008/0130,890 ENHANCED DATA SECURITY WITH REDUNDANT INCLUSIVE DATA ENCRYPTION SEGMENTS 5 2006
 
INTEL CORPORATION (1)
2005/0108,534 Providing services to an open platform implementing subscriber identity module (SIM) capabilities 10 2003
 
INTELLECTUAL VENTURES I LLC (1)
8,006,280 Security system for generating keys from access rules in a decentralized manner and methods therefor 8 2002
 
MICRON TECHNOLOGY, INC. (1)
7,370,166 Secure portable storage device 18 2005

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
8,751,789 General purpose distributed encrypted file system 0 2010
8,788,806 General purpose distributed encrypted file system 0 2012

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Oct 3, 2015
7.5 Year Payment $3600.00 $1800.00 $900.00 Oct 3, 2019
11.5 Year Payment $7400.00 $3700.00 $1850.00 Oct 3, 2023
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00

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