What is the difference between Autel SFD and Autel SGW?

SFD (Security Feature Diagnostic) and SGW (Security Gateway) are two security mechanisms used in automotive diagnostics to protect vehicle data and ensure only authorized access. However, they differ in their implementation, use cases, and the types of vehicles they are associated with.

SFD (Security Feature Diagnostic)

1) Mainly Used By: Volkswagen Group (VAG), including brands like VW, Audi, SEAT, Škoda, and others.
2) Purpose: SFD is a security feature that protects diagnostic access to certain vehicle functions. It requires authorized tools and a secure process for accessing restricted systems.
3) Access: To perform diagnostics on SFD-protected systems, the tool must authenticate with the manufacturer’s server, and often, temporary access is granted based on the tool and technician's authorization.
4) Usage: SFD is often used for specific systems, such as advanced driver assistance systems (ADAS) and some engine controls, to prevent unauthorized tampering.

SGW (Security Gateway)

1) Mainly Used By: Primarily found in FCA (Fiat Chrysler Automobiles, now Stellantis) vehicles, including brands like Fiat, Alfa Romeo, Jeep, Chrysler, Dodge, and others.
2) Purpose: SGW is designed to prevent unauthorized access to the vehicle's network, typically by blocking diagnostic tools that lack proper authorization.
3) Access: SGW often requires authorized tools that connect through a secure gateway or portal, verifying the technician’s credentials before allowing full access to diagnostic functions.
4) Usage: SGW protects the entire vehicle network, preventing unauthorized access not only to diagnostics but also to telematics and control functions to enhance vehicle cybersecurity.

Key Differences

1) Scope of Protection: SFD is usually more selective, securing certain modules, while SGW generally protects the entire vehicle network.
2) Manufacturers: SFD is associated with Volkswagen Group vehicles, while SGW is typically used by FCA/Stellantis brands.
3) Access Mechanism: SFD requires remote authorization through the manufacturer's server, while SGW often uses a gateway module that physically restricts network access unless an authorized tool is used.

Both systems represent efforts by automakers to safeguard vehicle integrity and ensure that only authorized professi