US Patent No: 5,394,471

Number of patents in Portfolio can not be more than 2000

Method and system for proactive password validation

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Abstract

An improved method for password validation comprising the steps of identifying bad passwords having one or more characters; computing a frequency of occurrence of bad password characters; computing a probability of occurrence T of the bad password characters within the bad passwords based upon the computed frequency of occurrence; identifying a proposed password having one or more characters; and comparing the proposed password characters with the probability of occurrence T of the bad password characters. The method further comprises the steps of establishing a validation threshold and validating the proposed password based upon the correspondence between (i) a value, BAp, reflecting the relationship between the probability of occurrence T of bad password characters within bad passwords and the proposed password characters and (ii) an established validation threshold. A Markov model is use to compute the probability of occurrence. The present invention also includes an improved password validation system.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
VERIZON SERVICES CORP.ARLINGTON, VA376

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davies, Christopher I Columbia, MD 1 32
Ganesan, Ravi Half Moon Bay, CA 101 1538

Cited Art

Patent Info (Count) # Cites Year
 
MOTOROLA, INC. (3)
4,440,976 Automatic selection of decryption key for multiple-key encryption systems 31 1981
4,926,475 Data encryption key failure monitor 17 1988
5,199,069 Automatic encryption selector 40 1991
 
HONEYWELL INC. (1)
5,307,409 Apparatus and method for fault detection on redundant signal lines via encryption 34 1992
 
SYNTELLECT SOFTWARE INC. (1)
4,974,191 Adaptive natural language computer interface system 154 1987

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (8)
5,832,211 Propagating plain-text passwords from a main registry to a plurality of foreign registries 85 1995
5,787,169 Method and apparatus for controlling access to encrypted data files in a computer system 79 1995
6,178,508 System for controlling access to encrypted data files by a plurality of users 35 1998
7,062,655 Method, system, and storage medium for determining trivial keyboard sequences of proposed passwords 6 2002
7,552,327 Method and apparatus for conducting a confidential search 0 2003
7,539,874 Secure password entry 4 2004
7,949,879 Secure password entry 0 2009
8,291,472 Real-time adjustments to authentication conditions 0 2010
 
HARRIS TECHNOLOGY, LLC (3)
7,467,403 Techniques for entry of less-than-perfect-passwords 4 2005
7,882,551 Techniques for entry of less than perfect passwords 1 2008
8,347,367 Techniques for entry of less than perfect passwords 0 2011
 
BELL ATLANTIC NETWORK SERVICES, INC. (2)
5,588,056 Method and system for generating pronounceable security passwords 19 1994
5,850,448 Programmed computer for generating pronounceable security passwords 17 1996
 
GRAPHON CORPORATION (2)
6,324,538 Automated on-line information service and directory, particularly for the world wide web 84 1998
7,127,464 Method for updating personal financial information on a web site 5 2004
 
GRAPHON NES SUB, LLC (2)
7,269,591 Method and apparatus for providing a pay-for-service web site 7 2004
7,028,034 Method and apparatus for providing a dynamically-updating pay-for-service web site 8 2004
 
INTEL CORPORATION (2)
5,701,464 Parameterized bloom filters 47 1995
6,134,551 Method of caching digital certificate revocation lists 99 1996
 
RESEARCH IN MOTION LIMITED (2)
7,904,729 Specifying a set of forbidden passwords 1 2006
8,140,867 Specifying a set of forbidden passwords 0 2011
 
APPLE INC. (1)
8,286,000 Techniques for dynamic generation and management of password dictionaries 0 2007
 
CITRIX SYSTEMS, INC. (1)
8,386,238 Systems and methods for evaluating a sequence of characters 0 2008
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
6,400,823 Securely generating a computer system password by utilizing an external encryption algorithm 13 1996
 
MINDPRINT, INC. (1)
5,909,589 Internet based training 63 1996
 
NEW AURORA CORPORATION (1)
7,685,431 System and method for determining relative strength and crackability of a user's security password in real time 3 2000
 
ORACLE INTERNATIONAL CORPORATION (1)
6,145,086 Security and password mechanisms in a database system 53 1999
 
PRESIDENT AND FELLOWS OF HARVARD COLLEGE (1)
6,920,477 Distributed, compressed Bloom filter Web cache server 28 2001
 
ROBERT BOSCH GMBH (1)
6,992,563 Method for protecting devices, specially car radios, against theft 0 1996
 
SANDIA NATIONAL LABORATORIES (1)
7,237,115 Authenticating concealed private data while maintaining concealment 5 2001
 
SAP AG (1)
7,581,245 Technique for evaluating computer system passwords 4 2005
 
YAMATAKE CORPORATION (1)
7,367,053 Password strength checking method and apparatus and program and recording medium thereof, password creation assisting method and program thereof, and password creating method and program thereof 5 2003