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Quantum cryptography

Patent for Quantum-Secure Network Security Solution Filed

Strategic Insights

— 2 min read

Arishta Networks Inc. has been awarded a patent for its quantum-secure network security solution, which leverages the power of quantum cryptography to secure data transmission between network devices. The patent, filed on December 19, 2023, and published online on October 7, 2025, addresses the potential security breach that occurs when transitioning to a quantum-secure environment.

The solution, described in the patent as a system and method for eliminating potential security breach when transitioning to quantum-secure environment, provides a new approach to eliminate the security breach by blocking the transmission of user data over a link until quantum keys are applied to encrypt the network traffic. The method involves configuring a link for communicating user data between network devices with static keys that do not match, exchanging key identifiers of the quantum keys over the link, acquiring the quantum keys from a quantum key distribution subsystem using the key identifiers, and applying the quantum keys to encrypt the network traffic communicated over the link.

Key Takeaways:

  • The patent provides a new approach to eliminate the potential security breach when transitioning to a quantum-secure environment by blocking the transmission of user data over a link until quantum keys are applied to encrypt the network traffic.
  • The method involves configuring a link for communicating user data between network devices with static keys that do not match, exchanging key identifiers of the quantum keys over the link, acquiring the quantum keys from a quantum key distribution subsystem using the key identifiers, and applying the quantum keys to encrypt the network traffic communicated over the link.
  • The solution addresses the weakness in leveraging Quantum Key Distribution (QKD) for the distribution of symmetric secret keys between network devices.
  • The patent claims that the solution ensures that no data is exchanged using a Layer 2 security protocol called Media Access Control Security (MACSec) over a data link before QKs are acquired and used for encryption/decryption at both ends of the data link.
  • The solution also eliminates Man-in-the-Middle (MITM) attacks by using the retrieved QKs to encrypt/decrypt traffic exchanged over the MACSec tunnel.

Statistics:

  • The patent was filed on December 19, 2023, and published online on October 7, 2025.
  • The patent number is 12438708.
  • The inventor is Olufemi Komolafe, with Dmitry Lyssenko as co-inventor.
  • Arista Networks Inc. is the assignee for this patent.

Sources:

  • "System and method for eliminating potential security breach when transitioning to quantum-secure environment." U.S. Patent Number 12438708, filed December 19, 2023, and published online on October 7, 2025.
  • VerticalNews, "Patent for Quantum-Secure Network Security Solution Filed," October 27, 2025.
  • NewsRx LLC, "Patent for Quantum-Secure Network Security Solution Filed," October 27, 2025.

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