This may be deemed slightly off topic but I felt like this community might know the answer to this. I'm looking for a way to permanently embed information about who is in a photo, but when I search Google I just get some forum posts from 10 years ago. Surely there is something more recent? How would you go about doing this? Let's assume they are JPG.

I thought about this when looking through photos from my grandparents, where the names are written on the back of the photo. I have many digital photos from ten years ago and I've already forgotten the names of some of the people so imagine what it will be like in another 30 years.