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CFNetwork SSLHandshake (-9806) error using NSURLSession when application in background for uploadTask

Before uploading a video using NSURLSession UploadTask, when the application is in the background, I encounter a CFNetwork SSL confirmation error. No problem downloading videos when the application is in the foreground. The problem only occurs when the application is in the background.

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Background NSURLSession handles many things differently, including auth. I would recommend that you carefully read all about background sessions and tasks in the Apple Programming Guide URL URLs , in particular the Background Transfers section.

You can also try to see what happens when you install a session delegate that implements a callback:

-[NSURLSessionDelegate URLSession:didReceiveChallenge:completionHandler:] .

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