  In collider physics at the TeV scale, there are many important processes
which involve six or more jets. The sensitivity of the physics analysis depends
critically on the performance of the jet clustering algorithm. We present a
full detector simulation study for the ILC of our new algorithm which makes use
of secondary vertices which improves the reconstruction of b jets. This
algorithm will have many useful applications, such as in measurements involving
a light Higgs which decays predominantly into two b quarks. We focus on the
measurement of the Higgs self-coupling, which has so far proven to be
challenging but is one of the most important measurements at the ILC.
