Abstract Originally designed for contactless smart cards in the form factor ID1, today ISO/IEC 14443 finds new applications in an increasing number of different form factors. Most famous among the new form factors are applications such as the electronic passport (e-passport) or contactless credit cards in a form factor that is only half or one third as large (“key fob”) as ID1. The need of incr...

Curricular demands and best practices for middle school require interdisciplinary units. Arts integration can provide motivation and a new pathway to learning. This unit focused on inquiry into the natural history of artifacts and rocks recovered from the exposed subsoil of an area near Cedar Falls, Iowa that had been bulldozed as part of subdivision development. The described unit involved pre...

In this paper we classify fuzzy subgroups of a rank-3 abelian group $G = mathbb{Z}_{p^n} + mathbb{Z}_p + mathbb{Z}_p$ for any fixed prime $p$ and any positive integer $n$, using a natural equivalence relation given in cite{mur:01}. We present and prove explicit polynomial formulae for the number of (i) subgroups, (ii) maximal chains of subgroups, (iii) distinct fuzzy subgroups, (iv) non-isomorp...

eCryptfs is a cryptographic filesystem for Linux that stacks on top of existing filesystems. It provides functionality similar to that of GnuPG, except the process of encrypting and decrypting the data is done transparently from the perspective of the application. eCryptfs leverages the recently introduced Linux kernel keyring service, the kernel cryptographic API, the Linux Pluggable Authentic...

In this paper we classify fuzzy subgroups of the dihedral group $D_{pqrs}$  for distinct primes  $p$, $q$, $r$ and $s$. This follows similar work we have done on distinct fuzzy subgroups of some dihedral groups.We present formulae for the number of (i) distinct maximal chains of subgroups, (ii) distinct fuzzy subgroups and (iii) non-isomorphic classes of fuzzy subgroups under our chosen equival...