Was Putin's official biography altered to hide his true identity?

Was Putin's official biography altered to hide his true identity?

Investigative journalist Krystyna Kurczab-Redlich claims that Putin was born in 1950, not 1952, to a mother from the Ural Mountains, not Leningrad. Kurczab-Redlich is not the first to delve into the unofficial version of the Russian president's biography, but her sensational book about Vova's childhood sheds new light on the psychology of the adult Putin.