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Related Experiment Videos

Physical one-way functions.

Ravikanth Pappu1, Ben Recht, Jason Taylor

  • 1Center for Bits and Atoms, The MIT Media Labs, 20 Ames Street, Cambridge, MA 02139, USA. ravi@thingmagic.com

Science (New York, N.Y.)
|September 21, 2002
PubMed
Summary
This summary is machine-generated.

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Researchers developed novel physical one-way functions using mesoscopic physics. These functions offer secure, tamper-resistant unique identifiers, moving beyond traditional number theory-based cryptography.

Area of Science:

  • Cryptography
  • Mesoscopic Physics
  • Information Security

Background:

  • Modern cryptography relies on one-way functions, which are difficult to reverse.
  • Existing methods often depend on unproven mathematical conjectures or have security flaws.

Purpose of the Study:

  • To explore mesoscopic physics for creating robust physical one-way functions.
  • To develop a new approach for allocating and authenticating unique identifiers.

Main Methods:

  • Utilizing coherent transport through disordered media to generate physical one-way functions.
  • Reducing a medium's microstructure to a fixed-length binary string for unique identification.

Main Results:

  • Demonstrated physical one-way functions that are inexpensive to produce and difficult to duplicate.

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  • These functions are intrinsically tamper-resistant and lack compact mathematical representations.

    • Conclusions:

    • Physical one-way functions offer a secure alternative to traditional cryptographic methods.
    • An authentication protocol leveraging the vast address space of these physical functions was proposed.