NO944432L - Klokkefrekvens modulasjon for sikre mikroprosessorer - Google Patents

Klokkefrekvens modulasjon for sikre mikroprosessorer

Info

Publication number
NO944432L
NO944432L NO944432A NO944432A NO944432L NO 944432 L NO944432 L NO 944432L NO 944432 A NO944432 A NO 944432A NO 944432 A NO944432 A NO 944432A NO 944432 L NO944432 L NO 944432L
Authority
NO
Norway
Prior art keywords
clock
clock frequency
frequency modulation
clock pulses
secure
Prior art date
Application number
NO944432A
Other languages
English (en)
Other versions
NO944432D0 (no
Inventor
Eric Sprunk
Original Assignee
Gen Instrument Corp
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 Gen Instrument Corp filed Critical Gen Instrument Corp
Publication of NO944432D0 publication Critical patent/NO944432D0/no
Publication of NO944432L publication Critical patent/NO944432L/no

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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W42/00—Arrangements for protection of devices
    • H10W42/40—Arrangements for protection of devices protecting against tampering, e.g. unauthorised inspection or reverse engineering
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/06—Clock generators producing several clock signals
    • 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
    • H04L9/002—Countermeasures against attacks on cryptographic mechanisms
    • 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
    • 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
    • H04L9/0668—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 producing a non-linear pseudorandom sequence
    • 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
    • H04L2209/04—Masking or blinding
    • H04L2209/043—Masking or blinding of tables, e.g. lookup, substitution or mapping
    • 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
    • H04L2209/08—Randomization, e.g. dummy operations or using noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Selective Calling Equipment (AREA)
  • Multi Processors (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Pulse Circuits (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Executing Machine-Instructions (AREA)
  • Microcomputers (AREA)
  • Storage Device Security (AREA)

Abstract

En sikker mikroprosessor er tllvelebragt med redusert sårbarhet overfor angrep. Tidligere er den sikre operasjonen hos silke prosessorer blitt overvunnet ved å observere opptredenen av klokken som anvendes av prosessoren. Slike observasjoner og forutsigelsen av påfølgende klokkepulser derfra, hindres ved å modulere klokken med en i alt vesentlig vilkårlig funksjon til å gl en uforutsigbar strøm av klokkepulser. Den sikre prosessoren reagerer på den uforutsigbare strøm av klokkepulser i den hensikt å behandle data i henhold til en sikkerhetsalgoritme.
NO944432A 1993-12-21 1994-11-18 Klokkefrekvens modulasjon for sikre mikroprosessorer NO944432L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/167,782 US5404402A (en) 1993-12-21 1993-12-21 Clock frequency modulation for secure microprocessors

Publications (2)

Publication Number Publication Date
NO944432D0 NO944432D0 (no) 1994-11-18
NO944432L true NO944432L (no) 1995-06-22

Family

ID=22608810

Family Applications (1)

Application Number Title Priority Date Filing Date
NO944432A NO944432L (no) 1993-12-21 1994-11-18 Klokkefrekvens modulasjon for sikre mikroprosessorer

Country Status (8)

Country Link
US (1) US5404402A (no)
EP (1) EP0660562B1 (no)
JP (1) JPH07239837A (no)
KR (1) KR100210524B1 (no)
AT (1) ATE196581T1 (no)
DE (1) DE69425952T2 (no)
NO (1) NO944432L (no)
TW (1) TW228042B (no)

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Also Published As

Publication number Publication date
KR950023026A (ko) 1995-07-28
EP0660562A3 (en) 1997-06-18
KR100210524B1 (ko) 1999-07-15
DE69425952D1 (de) 2000-10-26
EP0660562B1 (en) 2000-09-20
NO944432D0 (no) 1994-11-18
DE69425952T2 (de) 2001-05-10
ATE196581T1 (de) 2000-10-15
EP0660562A2 (en) 1995-06-28
US5404402A (en) 1995-04-04
TW228042B (en) 1994-08-11
JPH07239837A (ja) 1995-09-12

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