Re: Authentication with Diffie-Hellman, and using multiple assymetric keys together in sequence

F_r_e_e_d <kristian.freed@xxxxxxxxx> wrote:
In the general form, is responding successfully to a challenge of
decrypting E_K1(E_K2(...E_Kn(challenge))) as secure as managing to
respond successfully to the individual challenges of E_K1(challenge),
E_K2(challenge), ..., E_Kn(challenge)?

Naïvely, I'd expect this to be true. (I'm assuming independent challenges
in the second case, otherwise the second case is insecure...)

Kristian Gjøsteen