# NSConnectionDelegate An interface for interacting with low-level, interprocess connections. ``` @protocol NSConnectionDelegate ``` ## Overview The [`NSConnectionDelegate`](/documentation/Foundation/NSConnectionDelegate) protocol defines the optional methods implemented by delegates of [`NSConnection`](/documentation/Foundation/NSConnection) objects. ## Topics ### Authenticating [`- authenticateComponents:withData:`](/documentation/Foundation/NSConnectionDelegate/authenticateComponents:withData:) Returns a Boolean value that indicates whether given authentication data is valid for a given set of components. [`- authenticationDataForComponents:`](/documentation/Foundation/NSConnectionDelegate/authenticationDataForComponents:) Returns an `NSData` object to be used as an authentication stamp for an outgoing message. ### Responding to a Connection [`- connection:shouldMakeNewConnection:`](/documentation/Foundation/NSConnectionDelegate/connection:shouldMakeNewConnection:) Returns a Boolean value that indicates whether the parent connection should allow a given new connection to be created. [`- connection:handleRequest:`](/documentation/Foundation/NSConnectionDelegate/connection:handleRequest:) This method should be implemented by `NSConnection` object delegates that want to intercept distant object requests. [`- createConversationForConnection:`](/documentation/Foundation/NSConnectionDelegate/createConversationForConnection:) Returns an arbitrary object identifying a new conversation being created for the connection in the current thread. [`- makeNewConnection:sender:`](/documentation/Foundation/NSConnectionDelegate/makeNewConnection:sender:) Returns a Boolean value that indicates whether the parent should allow a given new connection to be created and configured. ## Relationships ### Inherits From [`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)