Webhook Signature check occasionally fails.

[Александр Смирнов]

We implemented webhook signature check using x-trello-webhook header like shown here.

It worked fine during weeks, but recently I and my colleague faced signature check failures.

I tried reset webhooks and after awhile or after actions we haven't noted it started work fine.

Probably it was a hacker attack or glitch in the service.

Please tell us possible reasons for this behavior and how to avoid it in the future.