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Rev

Thanks a lot..You are Right..I had done Mistake in That..But Now I am getting Exception>> System.err(416): java.security.InvalidKeyException: unknown key type passed to RSA Please Help me..Thanks in Advance..
– Riddhi Barbhaya
Commented Sep 18, 2012 at 10:12
3

Thanks for that. Just one remarks: keys are symmetrical. So You can either encode with public then decode with private (make sure to whom you send encrypted data) , OR, encode with private, then decode with public (to make sure who sent you the encrypted data). Doing the 2 (with 2 different key set), allow you to enforce both 'from who' and 'to whom' security aspects.
– Pascal
Commented Mar 11, 2013 at 13:47
3

The "encode with private" case in known as signature. But you should never directly sign data - always sign only the has otherwise you may run into some attacks (see IT security literature).
– Robert
Commented Mar 11, 2013 at 15:09
always sign only what?
– steveen zoleko
Commented Jan 19, 2017 at 11:40
"always sign only the hash" (SHA-256 or SHA-1 or ...)
– Robert
Commented Jan 19, 2017 at 11:53

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