jinsake

I have a question for you guys! I wanted to upload some cosplay photos of outstanding cosplays I've seen over the last few years at conventions - most of them are already locked on my livejournal and not visible to the public. The thing is, I am unsure if this qualifies as something I am allowed to do.  Am I violating anyone privacy by doing this?  The cosplayers in question gave me permission to take the photos, but am I infringing on their rights by posting to a public site? I haven't asked them if I can do this specifically, and I know that when I cosplay I accept that people taking photos are doing so with my permission. How do you all