As far as I understand, Elliptic Curve Pohlig-Hellman is not public-key.
It's a private key cipher.
Regards,
Sergio.
On 22/03/2010 09:56 a.m., Zacheusz Siedlecki wrote:
Hi,
Elliptic Curve Pohlig-Hellman is comutative. It's quite simple. I've
implemented it.
Regards,
Zacheusz Siedlecki
On Sun, Mar 21, 2010 at 10:13 PM, Sergio Lerner
<sergioler...@pentatek.com> wrote:
I looking for a public-key cryptosystem that allows commutation of the
operations of encription/decryption for different users keys
( Ek(Es(m)) = Es(Ek(m)) ).
I haven't found a simple cryptosystem in Zp or Z/nZ.
I think the solution may be something like the RSA analogs in elliptic
curves. Maybe a scheme that allows the use of a common modulus for all users
(RSA does not).
I've read on some factoring-based cryptosystem (like Meyer-Muller or
Koyama-Maurer-Okamoto-Vantone) but the cryptosystem authors say nothing
about the possibility of using a common modulus, neither for good nor for
bad.
Anyone has a deeper knowledge on this crypto to help me?
Best regards,
Sergio Lerner.
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