I believe they were attempting to link to https://eprint.iacr.org/2006/454 https://eprint.iacr.org/2006/454 a paper titled How to Win the Clone Wars: Efficient

I believe they were attempting to link to https://eprint.iacr.org/2006/454 https://eprint.iacr.org/2006/454 a paper titled How to Win the Clone Wars: Efficient Periodic n-Times Anonymous Authentication.