Slice the pork skin in desired sizes. Put the pork skin in a pot and put water just enough to cover the pork skin.
Add salt and black pepper and bring to a boil. Adjust heat to medium and cook the skin until tender.
When the pork skin is tender, drain the pork and put in a strainer or colander and let it cool for at least half an hour.
Put it in a rack or baking tray and sun dry for at least 10 hours. You can also use an oven and set the temperature to 50°C for 12 hours.
Let it cool for an hour and heat cooking oil in the deep pan to fry the pork skin. Adjust the stove to medium high heat and slowly fry the pork rind or pork skin until it puffs up and turn into cracklings and golden brown.
Continue stirring until the pork rind is cooked and crispy. Then remove from the hot oil and drain. Let it cool down before serving. Serve with spiced vinegar as dipping sauce.