Other designs 280px|thumbnail|RC4 is one of the most widely used stream cipher designs. Instead of a linear driving device, one may use a nonlinear update function. For example, Klimov and Shamir proposed triangular functions (T-functions) with a single cycle on n-bit words.
Other designs 280px|thumbnail|RC4 is one of the most widely used stream cipher designs. Instead of a linear, driving device, one may use a nonlinear update function. For example Klimov and Shamir proposed triangular functions (T-functions) with a single cycle on n-bit words.