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Improved 2-round collision attack on IoT hash standard ASCON-HASH.

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This summary is machine-generated.

This study analyzes ASCON-HASH, a lightweight cryptography standard. Researchers found a collision attack on the 2-round ASCON-HASH, demonstrating its vulnerabilities for Internet of Things security.

Keywords:
ASCONASCON-HASHCollision attackIoTLightweight cryptograph

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Area of Science:

  • Cryptography
  • Computer Science
  • Information Security

Background:

  • Lightweight cryptography algorithms are crucial for securing data in resource-constrained environments like the Internet of Things (IoT).
  • The National Institute of Standards and Technology (NIST) initiated a competition to select standardized lightweight cryptographic algorithms.
  • ASCON has been selected as a standard, with ASCON-HASH being its associated hash function.

Purpose of the Study:

  • To perform a detailed differential characteristic analysis of the ASCON-HASH function.
  • To investigate the security of ASCON-HASH against collision attacks.
  • To evaluate the practical implications of identified vulnerabilities.

Main Methods:

  • Differential cryptanalysis of ASCON-HASH, focusing on its quadratic S-box.
  • Application of message modification techniques to exploit differential properties.
  • Complexity analysis of the proposed collision attack.

Main Results:

  • A detailed analysis of ASCON-HASH's differential characteristics was conducted.
  • A non-practical collision attack on the 2-round ASCON-HASH was successfully demonstrated.
  • The attack requires a time complexity of approximately 2^98 hash function calls.

Conclusions:

  • The differential properties of ASCON-HASH, particularly its quadratic S-box, present potential security weaknesses.
  • The demonstrated collision attack, while non-practical, highlights the need for further security assessments of ASCON-HASH.
  • Ongoing research is essential to ensure the long-term security of lightweight cryptographic standards for IoT applications.