RSA cryptography?
 

hello!

How can I calculate public-key from private-key ???

You can't :D

You choose the public key and calculate the private key. ;)

hehehe ;-/
 

I have privaet-key D & N but I have calculate public-key E !

Ok, try the following:

Extract the key which is used to decrypt
and the modulus.
Now run te's RSA-Tool and type the DECRYPTION key
into the Encryption key box.
Also enter your modulus into the modulus field
and press Factorize.
After the two primes p,q are factorized, press calc D.

That should be your encryption key.

I tried this with a RSA keygenme.

;-/
 

I have priv-key... and I don't factorized because is to loooooooooooooooooooong factorized RSA-1024 ;-D

I have calculate public-key E form private-key D without factorized modulo N on P & Q

Like I said:
You can't calc E direclty.

Why do you think does the app use
RSA protection
and what do you think why all
the guys here say you that you can't
break an RSA >=512bit serial algo?

It is because you MUST factorize the
modulus N! No matter what you do.
(Except you find another way to break RSA).