Curing involves rubbing the salmon in a generous mixture of salt, sugar, and black pepper. This, paired with a lengthy refrigeration process, kills harmful bacteria or parasites.
You can then use your cured salmon to make your own sushi, salmon tartare, and more. However, keep in mind that the flavor will be a little saltier than typical sushi.
The longer salmon cures, the longer it lasts. While a cure of 36 hours can stay in the fridge for two days, hard-curing for three days can make it last for up to five days.