[e1ven]

While I agree it's good to use a burner key, you could have emailed him instead of posting links to both keys on HN...

[netinstructions]

I read that they were burner keys.

With people discussing reverse-engineering the pixelated images to access the keys, the merits of masks, security, etc it seemed like a lesson worth sharing for everyone's benefit here that an email wouldn't have accomplished.