People's Commissariat of State Security of the UkrSSR or NKDB of the UkrSSR (Ukrainian: Народний комісаріат державної безпеки УРСР; НКДБ УРСР) was a union-republican agency of state security that was created for the first time on March 12, 1941 according to ukase of the Presidium of the Verkhovna Rada of the Ukrainian SSR and which verbatim copied ukase of the Presidium of the Supreme Soviet of the Soviet Union of February 3, 1941.
On March 21, 1941, Verkhovna Rada implemented required changes and amendments to articles 45 and 48 of Constitution of the Ukrainian SSR.
After liberation of bigger part of territory of the USSR from the Nazi Germany occupation NKGB of the USSR was recreated according to resolution of Politburo of the Central Committee of the Communist Party of the Soviet Union and ukase of Presidium of the Supreme Council of April 14, 1943 and in May 1943 there was recreated NKDB of the UkrSSR.
Sergei Savchenko was appointed the narkom of state security of the UkrSSR on the orders of NKGB of the USSR.
That appointment was secured by ukase of Presidium of the Verkhovna Rada of October 25, 1943.