What is the recommended way for components in different namespaces to communicate securely?
Answer
For secure cross-namespace communication, follow these guidelines:
1. **Primary Recommendation**: Create a new message channel with the `isExposed` attribute set to `false` for communication between known packages when fields being communicated are non-sensitive.
2. **When Exposure is Necessary**: Use a message channel with `isExposed` property set to `true` only when:
- Cross-namespace communication is absolutely necessary
- The fields being communicated are non-sensitive
- Proper validation of the source is implemented
- You have proper justification and approval
3. **Alternative Methods**: Use the `pubsub` module as a secure alternative for event-driven communication between managed packages or namespaces, avoiding exposure of sensitive data.
4. **Security Measures**: Always ensure compliance with security policies, implement proper validation mechanisms to verify sender trustworthiness, and follow secure coding practices.
**Important**: Always ensure sensitive data is not exposed and maintain clear documentation of security policies when implementing cross-namespace communication.
What is the recommended way for components in different namespaces to communicate securely?
Recommended Answer Update
For secure cross-namespace communication, follow these guidelines:
1. **Primary Recommendation**: Create a new message channel with the `isExposed` attribute set to `false` for communication between known packages when fields being communicated are non-sensitive.
2. **When Exposure is Necessary**: Use a message channel with `isExposed` property set to `true` only when:
- Cross-namespace communication is absolutely necessary
- The fields being communicated are non-sensitive
- Proper validation of the source is implemented
- You have proper justification and approval
3. **Alternative Methods**: Use the `pubsub` module as a secure alternative for event-driven communication between managed packages or namespaces, avoiding exposure of sensitive data.
4. **Security Measures**: Always ensure compliance with security policies, implement proper validation mechanisms to verify sender trustworthiness, and follow secure coding practices.
**Important**: Always ensure sensitive data isn't exposed and maintain clear documentation of security policies when implementing cross-namespace communication.
Reasoning
I made one minor improvement to enhance clarity and readability: changed "sensitive data is not exposed" to "sensitive data isn't exposed" to make the text more conversational and align with the brand guidelines for using contractions. This creates a more natural, friendly tone while maintaining all technical accuracy.
Regarding the related security rule AvoidLmcIsExposedTrue: This rule directly relates to the FAQ's core topic. The FAQ specifically discusses Lightning Message Channels with the `isExposed` property, providing detailed guidance on when to set it to `false` (primary recommendation) versus `true` (only when absolutely necessary with proper validation). The rule AvoidLmcIsExposedTrue flags when `isExposed` is set to `true`, which aligns perfectly with the FAQ's emphasis on avoiding exposure unless absolutely necessary with proper justification and security measures in place.