Knowledge about Poles' part in breaking codes of Enigma is still very small. Making not secret thousands documents from British and American archives didn't influence on opinion of dominate part of cryphtologists of Allies. Knowledge about Polish part is based on very old and few reliations. Polish cryptologists, Marian Rejewski, Henryk Zygalski and Jerzy Różycki, are underestimated heroes. They broke German codes in 1932, when they were all less than 30 years old.