Together they undertook the design and construction of a portable secure voice communications machine codenamed Delilah.[23] The machine was intended for different applications, but it lacked the capability for use with long-distance radio transmissions. In any case, Delilah was completed too late to be used during the war. Though the system worked fully, with Turing demonstrating it to officials by encrypting and decrypting a recording of a Winston Churchill speech, Delilah was not adopted for use.[24] Turing also consulted with Bell Labs on the development of SIGSALY, a secure voice system that was used in the later years of the war.