CA2336291A1 - Cryptographic communication process and apparatus - Google Patents

Cryptographic communication process and apparatus Download PDF

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Publication number
CA2336291A1
CA2336291A1 CA002336291A CA2336291A CA2336291A1 CA 2336291 A1 CA2336291 A1 CA 2336291A1 CA 002336291 A CA002336291 A CA 002336291A CA 2336291 A CA2336291 A CA 2336291A CA 2336291 A1 CA2336291 A1 CA 2336291A1
Authority
CA
Canada
Prior art keywords
alpha
key
decrypt
encrypt
text
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002336291A
Other languages
French (fr)
Other versions
CA2336291C (en
Inventor
Edward M. Scheidt
C. Jay Wack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tecsec Inc
Original Assignee
Tecsec, Incorporated
Edward M. Scheidt
C. Jay Wack
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tecsec, Incorporated, Edward M. Scheidt, C. Jay Wack filed Critical Tecsec, Incorporated
Publication of CA2336291A1 publication Critical patent/CA2336291A1/en
Application granted granted Critical
Publication of CA2336291C publication Critical patent/CA2336291C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H04L9/0637—Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords

Abstract

A communication system, which includes an origination space, a communications channel, and a destination space associated with the origination space via the communications channel. The origination space includes an encryption engine for generating an output symbol O t based on an input symbol It and means for receiving an encrypt key, an encrypt text/key relation, and the input symbol. The destination space includes a decryption engine for generating a decrypted symbol l't based on the output symbol received from the origination space via the communications channel and means for receiving a decrypt key and a decrypt text/key relation. The encrypt text/key relation controls the encryption engine such that O t=
.alpha.N(t) +
.pi.N[.alpha.N-1(t) + .pi.N-1[.alpha.N-2(t) + . . . + .pi.2[.alpha.1(t) +
.pi.1[l t + .alpha.0(t)]] . . .]], mod W, where .alpha.N, .alpha.N-1, . . . , .alpha.1, .alpha.0 are N+1 additive transformations defined by the encrypt key, where .pi.N, .pi.N-1, . . . , .pi.2, .pi.0 are N permutations defined by the encrypt key, and where W represents the number of possibilities for each permutation defined by the encrypt key. The decrypt text/key relation controls the decryption engine such that l't =.pi.1 -1[.pi.2 -1[.pi.3 -1 . . . [.pi.N-1 -1[.pi.N -1[O
t-.alpha.'N(t)]-.alpha.'N-1(t)]- ...-.alpha.'3(t)]-.alpha.'2(t)]-.alpha.'1(t)]-.alpha.'0(t), mod W, where .pi.i-1 is defined by the decrypt key as the inverse of the permutation .pi.1, where .alpha.'N, .alpha.'N-1, . . . , .alpha.'1, .alpha.'0 are N+1 additive transformations defined by the decrypt key, and where W represents the number of possibilities for each inverse permutation defined by the decrypt key.
CA002336291A 1998-07-01 1998-07-02 Cryptographic communication process and apparatus Expired - Lifetime CA2336291C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/108,312 US6075865A (en) 1998-07-01 1998-07-01 Cryptographic communication process and apparatus
US09/108,312 1998-07-01
PCT/US1998/013626 WO2000002340A2 (en) 1998-07-01 1998-07-02 Cryptographic communication process and apparatus

Publications (2)

Publication Number Publication Date
CA2336291A1 true CA2336291A1 (en) 2000-01-13
CA2336291C CA2336291C (en) 2007-03-27

Family

ID=22321489

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002336291A Expired - Lifetime CA2336291C (en) 1998-07-01 1998-07-02 Cryptographic communication process and apparatus

Country Status (22)

Country Link
US (2) US6075865A (en)
EP (1) EP1260052B1 (en)
JP (1) JP4053730B2 (en)
KR (1) KR100355620B1 (en)
CN (1) CN1636343A (en)
AP (1) AP2001002031A0 (en)
AT (1) ATE307436T1 (en)
AU (1) AU748259B2 (en)
BR (1) BR9815922A (en)
CA (1) CA2336291C (en)
CZ (1) CZ299773B6 (en)
DE (1) DE69831982T2 (en)
EA (1) EA003231B1 (en)
HU (1) HUP0204260A2 (en)
IL (1) IL140637A (en)
MX (1) MXPA01000220A (en)
NO (1) NO20006673D0 (en)
NZ (1) NZ509290A (en)
OA (1) OA11628A (en)
PL (1) PL347367A1 (en)
WO (1) WO2000002340A2 (en)
ZA (1) ZA200100561B (en)

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Publication number Priority date Publication date Assignee Title
US10361802B1 (en) 1999-02-01 2019-07-23 Blanding Hovenweep, Llc Adaptive pattern recognition based control system and method
ATE429748T1 (en) * 1998-01-02 2009-05-15 Cryptography Res Inc LEAK RESISTANT CRYPTOGRAPHIC METHOD AND APPARATUS
US7587044B2 (en) 1998-01-02 2009-09-08 Cryptography Research, Inc. Differential power analysis method and apparatus
WO2003065169A2 (en) 2002-01-30 2003-08-07 Tecsec, Inc. Access system utilizing multiple factor identification and authentication
CA2333095C (en) 1998-06-03 2005-05-10 Cryptography Research, Inc. Improved des and other cryptographic processes with leak minimization for smartcards and other cryptosystems
ATE360866T1 (en) 1998-07-02 2007-05-15 Cryptography Res Inc LEAK-RESISTANT UPDATING OF AN INDEXED CRYPTOGRAPHIC KEY
US7292693B1 (en) * 1998-08-13 2007-11-06 Teledyne Technologies Incorporated Deterministically generating block substitution tables which meet a given standard of nonlinearity
US6578061B1 (en) * 1999-01-19 2003-06-10 Nippon Telegraph And Telephone Corporation Method and apparatus for data permutation/division and recording medium with data permutation/division program recorded thereon
US6735174B1 (en) * 2000-03-29 2004-05-11 Intel Corporation Method and systems for flow control of transmissions over channel-based switched fabric connections
US7280663B1 (en) * 2000-05-22 2007-10-09 University Of Southern California Encryption system based on crossed inverse quasigroups
WO2002003605A1 (en) * 2000-07-04 2002-01-10 Koninklijke Philips Electronics N.V. Substitution-box for symmetric-key ciphers
US7181017B1 (en) 2001-03-23 2007-02-20 David Felsher System and method for secure three-party communications
US20070195960A1 (en) * 2002-04-12 2007-08-23 General Dynamics Advanced Information Systems Apparatus and method for encrypting data
FR2831365B1 (en) * 2002-05-06 2004-02-13 Sagem METHOD FOR CONTROLLING ACCESS TO A NETWORK
US20040022390A1 (en) * 2002-08-02 2004-02-05 Mcdonald Jeremy D. System and method for data protection and secure sharing of information over a computer network
KR100456599B1 (en) * 2002-11-12 2004-11-09 삼성전자주식회사 Cryptographic apparatus with parallel des structure
US9818136B1 (en) 2003-02-05 2017-11-14 Steven M. Hoffberg System and method for determining contingent relevance
US20070101140A1 (en) * 2003-07-31 2007-05-03 Thomas Licensing, Inc. Generation and validation of diffie-hellman digital signatures
US7366299B2 (en) * 2003-09-26 2008-04-29 International Business Machines Corporation Method for encrypting and decrypting data using derivative equations and factors
US7526643B2 (en) * 2004-01-08 2009-04-28 Encryption Solutions, Inc. System for transmitting encrypted data
US8031865B2 (en) * 2004-01-08 2011-10-04 Encryption Solutions, Inc. Multiple level security system and method for encrypting data within documents
US7752453B2 (en) 2004-01-08 2010-07-06 Encryption Solutions, Inc. Method of encrypting and transmitting data and system for transmitting encrypted data
WO2006020426A2 (en) 2004-07-29 2006-02-23 Infoassure, Inc. Cryptographic key construct
US20060282681A1 (en) * 2005-05-27 2006-12-14 Scheidt Edward M Cryptographic configuration control
US8874477B2 (en) 2005-10-04 2014-10-28 Steven Mark Hoffberg Multifactorial optimization system and method
CN101931623B (en) * 2010-07-06 2013-06-12 华南理工大学 Safety communication method suitable for remote control with limited capability at controlled end
US10212144B2 (en) 2013-03-15 2019-02-19 Assa Abloy Ab Digital credential with embedded authentication instructions
US9547767B2 (en) * 2013-11-13 2017-01-17 Via Technologies, Inc. Event-based apparatus and method for securing bios in a trusted computing system during execution
DE102014016548A1 (en) * 2014-11-10 2016-05-12 Giesecke & Devrient Gmbh Method for testing and hardening software applications

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316055A (en) * 1976-12-30 1982-02-16 International Business Machines Corporation Stream/block cipher crytographic system
US5375169A (en) * 1993-05-28 1994-12-20 Tecsec, Incorporated Cryptographic key management method and apparatus
US5454039A (en) * 1993-12-06 1995-09-26 International Business Machines Corporation Software-efficient pseudorandom function and the use thereof for encryption

Also Published As

Publication number Publication date
KR20010074633A (en) 2001-08-04
AP2001002031A0 (en) 2001-03-31
IL140637A (en) 2005-08-31
AU748259B2 (en) 2002-05-30
EP1260052B1 (en) 2005-10-19
EP1260052A2 (en) 2002-11-27
PL347367A1 (en) 2002-04-08
OA11628A (en) 2004-09-10
EA003231B1 (en) 2003-02-27
ZA200100561B (en) 2002-03-27
AU8277598A (en) 2000-01-24
IL140637A0 (en) 2002-02-10
US6075865A (en) 2000-06-13
EA200100093A1 (en) 2001-12-24
CN1636343A (en) 2005-07-06
DE69831982D1 (en) 2005-11-24
EP1260052A4 (en) 2004-04-14
US6266417B1 (en) 2001-07-24
BR9815922A (en) 2001-02-20
NZ509290A (en) 2003-07-25
NO20006673D0 (en) 2000-12-28
WO2000002340A3 (en) 2002-09-12
MXPA01000220A (en) 2002-04-24
JP2003516552A (en) 2003-05-13
ATE307436T1 (en) 2005-11-15
CA2336291C (en) 2007-03-27
KR100355620B1 (en) 2002-10-11
CZ299773B6 (en) 2008-11-19
WO2000002340A2 (en) 2000-01-13
DE69831982T2 (en) 2006-04-27
CZ20004935A3 (en) 2001-08-15
JP4053730B2 (en) 2008-02-27
HUP0204260A2 (en) 2003-04-28

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Effective date: 20180703