What is the basic difference between black hat and white hate SEO?

Black Hat SEO	White Hat SEO
Black hat SEO refers to attempts to improve rankings in ways that are not approved by search engines and involve deception. They go against current search engine guidelines.	White hat SEO refers to use of good practice methods to achieve high search engine rankings. They comply with search engine guidelines.
Techniques used to get higher search rankings in an unethical manner.	Conforms to search engine designs and involves no deception.
Disapproved by search engines.	Approved by search engines.
Site is eventually banned, de-indexed or penalized through lower rankings.	Results last a long time.
Black hat SEO techniques include keyword stuffing, doorway and cloaked pages, link farming, hidden texts and links, blogcomment spam	White hat SEO techniques include research, analysis, re- write meta tags to be more relevant, content improvement and web redesign.