Hi,
We don't read, not write anything to do with your SSH keys. In fact, we don't write anything to your profile at all. This is a limitation of GitHub's API scope.
Short answer: https://gitter.zendesk.com/hc/en-us/articles/200178961-Why-d...
Long answer:https://gitter.zendesk.com/hc/en-us/articles/200176672-Authe...
PS, your SSH keys are 100% public: https://api.github.com/users/masom/keys
Mike