The solution of McCurley's discrete log challenge
We provide the secret Diffie-Hellman-Key which is requested by Kevin McCurley's challenge of 1989. The DH-protocol in question has been carried out in (ℤ/pℤ) where p is a 129-digit prime of special form. Our method employed the Number Field Sieve. The linear algebra computation was done by the Lanczos algorithm.