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

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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, CA8203
SUN MICROSYSTEMS, INC.SANTA CLARA, CA2421

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Perlman, Radia Sammamish, US 22 506

Cited Art Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
* 7,778,417 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
 
INTELLECTUAL VENTURES I LLC (1)
* 8,006,280 Security system for generating keys from access rules in a decentralized manner and methods therefor 15 2002
 
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 158 1992
5,351,295 Secure method of neighbor discovery over a multiaccess medium 37 1993
5,483,598 Message encryption using a hash function 46 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 80 1996
5,892,828 User presence verification with single password across applications 64 1996
 
INTEL CORPORATION (1)
* 2005/0108,534 Providing services to an open platform implementing subscriber identity module (SIM) capabilities 17 2003
 
Micron Technology, Inc. (1)
* 7,370,166 Secure portable storage device 28 2005
 
SUN MICROSYSTEMS, INC. (3)
6,996,712 Data authentication system employing encrypted integrity blocks 24 2000
* 2002/0136,410 Method and apparatus for extinguishing ephemeral keys 33 2001
2003/0115,154 System and method for facilitating operator authentication 11 2001
 
ORACLE AMERICA, INC. (21)
6,389,532 Method and apparatus for using digital signatures to filter packets in a network 87 1998
6,173,400 Methods and systems for establishing a shared secret using an authentication token 111 1998
6,230,266 Authentication system and process 88 1999
6,510,523 Method and system for providing limited access privileges with an untrusted terminal 103 1999
6,883,100 Method and system for dynamic issuance of group certificates 24 1999
7,213,262 Method and system for proving membership in a nested group using chains of credentials 19 1999
6,363,480 Ephemeral decryptability 79 1999
6,263,434 Signed group criteria 25 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 47 2000
6,546,486 Content screening with end-to-end encryption within a firewall 11 2000
6,560,705 Content screening with end-to-end encryption prior to reaching a destination 16 2000
6,636,838 Content screening with end-to-end encryption 30 2000
7,178,021 Method and apparatus for using non-secure file servers for secure information storage 39 2000
7,054,905 Replacing an email attachment with an address specifying where the attachment is stored 90 2000
7,058,798 Method ans system for pro-active credential refreshing 19 2000
6,975,729 Method and apparatus for facilitating use of a pre-shared secret key with identity hiding 4 2000
7,016,499 Secure ephemeral decryptability 10 2001
2002/0191,797 Secure ephemeral decryptability 10 2001
* 7,792,300 Method and apparatus for re-encrypting data in a transaction-based secure storage system 18 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)
8,751,789 General purpose distributed encrypted file system 0 2010
8,788,806 General purpose distributed encrypted file system 0 2012
* Cited By Examiner

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