MY145989A - A polymorphic cipher - Google Patents

A polymorphic cipher

Info

Publication number
MY145989A
MY145989A MYPI20092762A MY145989A MY 145989 A MY145989 A MY 145989A MY PI20092762 A MYPI20092762 A MY PI20092762A MY 145989 A MY145989 A MY 145989A
Authority
MY
Malaysia
Prior art keywords
subkey
encryption key
rounds
placing
row
Prior art date
Application number
Inventor
Magdy Saeb
Original Assignee
Mimos Berhad
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 Mimos Berhad filed Critical Mimos Berhad
Priority to MYPI20092762 priority Critical patent/MY145989A/en
Priority to PCT/MY2010/000104 priority patent/WO2011002274A1/en
Publication of MY145989A publication Critical patent/MY145989A/en

Links

Classifications

    • 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
    • H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/24—Key scheduling, i.e. generating round keys or sub-keys for block encryption

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

A METHOD (100) FOR ENCRYPTION THROUGH A KEY DRIVEN POLYMORPHIC CIPHER BY INITIALIZING A PSEUDORANDOM NUMBER GENERATOR, THE METHOD COMPRISES THE STEPS OF GENERATING A SUBKEY TABLE BASED ON AN ENCRYPTION KEY (K) (102), EXTRACTING FROM THE SUBKEY TABLE BLOCKS OF DATA X (104), MIXING EXTRACTED DATA FOR A NUMBER OF ROUNDS (106) AND PRODUCING A BLOCK OF CIPHERTEXT (108). THE METHOD FOR GENERATING A SUBKEY TABLE BASED ON AN ENCRYPTION KEY (K) FURTHER COMPRISES THE STEPS OF HASHING THE ENCRYPTION KEY (K) TO OBTAIN HO WHEREIN HO =H(K) (202), PLACING HO ON FIRST ROW OF THE SUBKEY TABLE (204),OBTAINING PI AND QI USING HI = H (PI. HI-1 + QI) FROM THE ENCRYPTION KEY (K) WHEREIN PI, AND QI ARE TWO LARGE SECRET INTEGER NUMBERS FOR I BEING 1 TO N NUMBER OF ROUNDS (206), DETERMINING HI, WHICH IS THE SUBKEY FOR I-TH ROUND (208) AND PLACING HI AS (I+1)ST ROW OF THE SUBKEY TABLE (210).
MYPI20092762 2009-06-29 2009-06-29 A polymorphic cipher MY145989A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MYPI20092762 MY145989A (en) 2009-06-29 2009-06-29 A polymorphic cipher
PCT/MY2010/000104 WO2011002274A1 (en) 2009-06-29 2010-06-22 A polymorphic cipher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MYPI20092762 MY145989A (en) 2009-06-29 2009-06-29 A polymorphic cipher

Publications (1)

Publication Number Publication Date
MY145989A true MY145989A (en) 2012-06-04

Family

ID=43411204

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20092762 MY145989A (en) 2009-06-29 2009-06-29 A polymorphic cipher

Country Status (2)

Country Link
MY (1) MY145989A (en)
WO (1) WO2011002274A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8699703B2 (en) 2011-10-19 2014-04-15 Apple Inc. System and method for pseudo-random polymorphic tree construction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6259789B1 (en) * 1997-12-12 2001-07-10 Safecourier Software, Inc. Computer implemented secret object key block cipher encryption and digital signature device and method
US7254231B1 (en) * 1999-10-14 2007-08-07 Ati International Srl Encryption/decryption instruction set enhancement
JP3505482B2 (en) * 2000-07-12 2004-03-08 株式会社東芝 Encryption device, decryption device, extended key generation device, extended key generation method, and recording medium
KR100675837B1 (en) * 2004-12-13 2007-01-29 한국전자통신연구원 High speed BCM-EAS block encryption apparatus and method

Also Published As

Publication number Publication date
WO2011002274A1 (en) 2011-01-06

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