Here is a usda site and it says properly stored up to 5 years,

http://www.fsis.usda.gov/Help/FAQs_Hotline_Preparation/index.asp#10

And this is a site with a faq for canning in general,

http://www.uga.edu/nchfp/questions/FAQ_canning.html

This site does not recomend some of the canning methods on the endtimesreport.com web site that is in gatormba's post.