Make the dip by mixing in a bowl: Greek yogurt, sour cream, malt vinegar, chives, and salt and pepper to taste. Cover and chill in the refrigerator until ready to serve.
Slice the potatoes into thin slices using a mandoline or food processor (the potato slices should be translucent).
Soak the potato slices in a large bowl of cold water for 30 minutes.
Dry the potatoes well.
Heat two cups of canola oil in a cast iron pan or dutch oven on medium heat.
Cooking in batches, fry the potato slices for 6-7 minutes per batch, flipping the slices over halfway through.
After each batch finishes frying, drain the chips on a paper towel and sprinkle with salt to taste.
Serve the chips at room temperature with the cool dipping sauce.