An algebraic attack to the Bluetooth stream cipher E0. (arXiv:2201.01262v2 [cs.CR] UPDATED)

In this paper we study the security of the Bluetooth stream cipher E0 from
the viewpoint it is a "difference stream cipher", that is, it is defined by a
system of explicit difference equations over the finite field GF(2). This
approach highlights some issues of the Bluetooth encryption such as the
invertibility of its state transition map, a special set of 14 bits of its
132-bit state which when guessed implies linear equations among the other bits
and finally a …

attack bluetooth cipher stream stream cipher