Commerical jerky uses specific chemical preservatives to increase the shelf life. My recipe is fairly simple but obviously loaded with salt. Salt is the main preservative in most cured meats.

1 1/2 to 2 pounds flank steak
2/3 cup Worcestershire sauce
2/3 cup soy sauce
1 tablespoon honey
2 teaspoons freshly ground black pepper
2 teaspoons onion powder
1 teaspoon liquid smoke
1 teaspoon red pepper flakes

Rarely do I ever measure any of these ingredients!

I do not know how long it will last. Me and my son seem to eat it up pretty fast. Jerky is definitely not health food. Might be interesting to try to cure meat with just spices and maybe honey for some balance.