Exetools  

Go Back   Exetools > General > General Discussion

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 08-19-2003, 00:22
ManSun
 
Posts: n/a
RSA cryptography?

hello!

How can I calculate public-key from private-key ???
Reply With Quote
  #2  
Old 08-19-2003, 00:46
ArC ArC is offline
VIP
 
Join Date: Jan 2003
Location: NTOSKRNL.EXE
Posts: 172
Rept. Given: 0
Rept. Rcvd 1 Time in 1 Post
Thanks Given: 5
Thanks Rcvd at 17 Times in 12 Posts
ArC Reputation: 1
You can't

You choose the public key and calculate the private key.
Reply With Quote
  #3  
Old 08-19-2003, 00:53
ManSun
 
Posts: n/a
hehehe ;-/

I have privaet-key D & N but I have calculate public-key E !
Reply With Quote
  #4  
Old 08-19-2003, 01:09
ArC ArC is offline
VIP
 
Join Date: Jan 2003
Location: NTOSKRNL.EXE
Posts: 172
Rept. Given: 0
Rept. Rcvd 1 Time in 1 Post
Thanks Given: 5
Thanks Rcvd at 17 Times in 12 Posts
ArC Reputation: 1
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.
Reply With Quote
  #5  
Old 08-19-2003, 01:19
ManSun
 
Posts: n/a
;-/

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
Reply With Quote
  #6  
Old 08-19-2003, 01:30
ArC ArC is offline
VIP
 
Join Date: Jan 2003
Location: NTOSKRNL.EXE
Posts: 172
Rept. Given: 0
Rept. Rcvd 1 Time in 1 Post
Thanks Given: 5
Thanks Rcvd at 17 Times in 12 Posts
ArC Reputation: 1
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).
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
PYG Cryptography Synthesis Tool 5.0.0.5 CriticalError Community Tools 0 09-06-2015 13:13
Cryptography Unforgiv3N General Discussion 0 09-22-2005 05:11
RSA Cryptography koncool General Discussion 1 09-15-2003 04:04


All times are GMT +8. The time now is 17:49.


Always Your Best Friend: Aaron, JMI, ahmadmansoor, ZeNiX, chessgod101
( 1998 - 2024 )