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S2X Secure Link

NIS-certified cryptographic module (KCMVP)

Link encryption solution using S2X Crypto

S2X Secure Link

(ISO 21177)

An essential element for building mobility security infrastructure based on international standards, including V2X, drone, and IoT communication link security


SAESOL Tech’s Secure Link is a mobility station security service for secure session establishment and authentication between trusted devices.

It provides security services needed to authenticate sources between devices that make up mobility systems, and to ensure confidentiality and integrity of application activities, delivering strong link security.

It supports security services using certificates issued by a trusted CA and valid certificates.

  • International standard support
  • Communication channel protection using TLS
  • Interoperability assurance
  • Access control support 

Key Functions


V2X message security

  • Signature on transmitted V2X messages, and signature/authorization verification for received messages

Communication link security

  • Session management such as Secure Session connect/disconnect using ITS certificates (based on IEEE 1609.2)
  • Data transmission/reception via Secure Session

Certificate management

  • Issuance/renewal management of certificates required for ITS security on devices

Why, S2X Secure Link


Optimization for real-time communication


  • Millisecond-level response times are required for V2V/V2I; provides lightweight authentication and session establishment protocols for ITS environments

Automated authentication and connection


  • When manual authentication is impossible, automatic device-to-device authentication is essential; designed so devices can authenticate themselves and establish secure sessions

Suitable for distributed environments


  • ITS is an environment where many vehicles, sensors, and infrastructure communicate simultaneously; X.509-based VPNs have limits in scalability and flexibility due to centralized structures

Compatibility with autonomous driving and smart city technologies


  • When considering integration with smart city and traffic infrastructure, an international-standard-based security system is required

S2X Secure Link: ISO 21177 Configuration


SSProxy Server
  • Applied to C-ITS service networks to relay and protect incoming external traffic
  • Operates like a security gateway, ensuring safe V2X communication flows
SSProxy Agent
  • Installed on devices to support TLS-based link encryption
  • Establishes a secure channel between devices and infrastructure to ensure data integrity and confidentiality
  • Provided in library or gateway form
Admin Console
  • Provides an interface to monitor and manage agent status and certificate validity in real time
  • Improves operational convenience and control for security administrators

Are you looking for a KCMVP-validated cryptographic module?

OpenSSL API compatibility secured, NIS-certified cryptographic module (KCMVP)

Do more with connectivity


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