According to the memoirs of a former MI5 intelligence officer, in the 1960s, Marychurch, then a young GCHQ cryptanalyst, applied computerised cluster analysis to the problem of traffic analysis of espionage traffic. Marychurch lends his name to the "Sir Peter Marychurch award", an honour given annually for work in international cryptology.
In accordance with the memoirs of a former MI5 intelligence officer, in the 1960s, Marychurch, then a young GCHQ cryptanalyst, applied computerized group analysis to the problem of traffic analysis of espionage communications. Marychurch lends his name to the "Sir Peter Marychurch award", an honour given annually for work in international cryptography.