iTunes software service authentication error domain error 434

Question

I am uploading iPhone application using latest xCode 8. I have good internet connection and all the relevant settings set up at iTunes connect. My distribution profiles are also set up correctly.

I am facing below error:-

iTunes software service authentication error domain error 434

Answer 1

So this has what worked for me:

Preface: 4 days of debugging, recreated certificates numerous times, nothing worked, every time i try to validate/upload via Xcode it says same error "iTunes software service authentication error domain error 434"

Solution without XCode:

1. Create archive in Xcode
2. Export IPA in Organiser (Xcode > window > Organiser)
3. Open Application Loader and manually choose IPA generated
4. Done

Solution with XCode:

1. Create archive in Xcode
2. Click Validate
3. Unselect BitCode
4. Check if its validated, mine got validated when i unchecked bitcode
5. Not Try to genrate similar fashion with Bitcode unselected
6. If all goes fine now generate with Bitcode Checked(mine worked with these exact steps)
7. Done

Answer 2

This is a very common error while uploading a build to iTunes Connect. A simple answer to it : "Just RETRY".