security - Java Generate Unique Surrogate alphanumeric key based on text -


i wanted generate unique key based on few columns(one of them search word....so length can long). volume of records around 6 million. have used md5 , generated 32-character alphanumeric string. how confident can unique? can suggest other solution? in advance

find md5 data of md5 have got earlier of word. eg. converting string md5 "password"=>"5f4dcc3b5aa765d61d8327deb882cf99" "5f4dcc3b5aa765d61d8327deb882cf99"=>"696d29e0940a4957748fe3fc9efd22a3"

for getting have 2 times eg "696d29e0940a4957748fe3fc9efd22a3"=>"5f4dcc3b5aa765d61d8327deb882cf99 "5f4dcc3b5aa765d61d8327deb882cf99=>"password"

you may use site online testing http://md5.gromweb.com/

you may till want.hope :)


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