Hello,
I am coming with question that whose OAuth is used by Trello. I need to fill out a security exception for Unito, and since it integrates with Trello, need to know if Trello is using Google or Microsoft’s OAuth or someone else’s ?
Could someone answer?
Thanks!
Trello has implemented its own Basic OAuth1.0 implementation: Authorization
If I’m understanding your question correctly, the OAuth1.0 implemented by Trello is its own. We do not use another OAuth provider for this implementation.
Hi Bentley,
Thank you for response! 
If we would like to answer this question by one sentence:
"Is Trello using Google or Microsoft OAuth or if someone else's, who ?"
… how it should sound?
"Trello using ... OAuth" (where dots should be replaced by business/corporation name)
Is "Trello using its own(Trello) OAuth" is correct ?
Because at this moment I am a little confused how to properly answer for those question 