First of all, Thank you all people for making this amazing technology.
I’m a university student who wants making a E-book using your pages’ image. When I searched for your image’s licenses or copyrights, but cannot be found(maybe it’s my fault). So, I ask about image’s copyrights whether I CAN USE in commercial purposes or NOT.
Images that I want to use linked below.
https://letsencrypt.org/images/howitworks_challenge.png https://letsencrypt.org/images/howitworks_authorization.png https://letsencrypt.org/images/howitworks_certificate.png https://letsencrypt.org/images/howitworks_revocation.png https://letsencrypt.org/images/Issuance-April-10-2016.png
Could you please reply me when it’s possible? or, Are those pics licensed under the CC-BY-NC 4.0 (Attribution, Non-commercial) according to this topic?
Thanks for watching this topic. so sorry for my bad English.