  The electroweak symmetry is unbroken in the core of cosmic strings
originating from a symmetry breaking at an energy higher than the electroweak
scale $\eta_{EW}$. The dynamics of such strings may generate a baryon asymmetry
below the electroweak symmetry breaking scale. This mechanism for electroweak
baryogenesis is most efficient if the scale of string formation is only
slightly higher than $\eta_{EW}$ \eg \ in theories of dynamical symmetry
breaking) and if the strings are superconducting. The mechanism is also
effective if the electroweak phase transition is second order.
