java - JSF 2.0 How a CAPTCHA works -


can sombody recommend me captcha tool jsf pages? there captcha tool included in jee6 or have add project, external .jar?

also there brief tutorial on how include in program? or steps should follow so?(i never used captcha before).

here example thing can use. there no integrated support in jee6, have in provided example or have componenet has functionality. know of 1 in primefaces components here (it uses popular recaptcha componenet)


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