Russian (Soviet) Doktor nauk is fake of International degree and have no equivalence in US.

• Diploma o nepolnom vysshem obrazovanii (diploma of
incomplete higher education): If students leave university after
at least 2 years of study, they may ask for this diploma, which
allows them to work in certain jobs that require some university
experience but not a degree.
• Bakalavr (bachelor’s degree): Program requiring 4 years of
university study.
• Magistr (master’s degree): Competitive 2-year program for
students who have completed their bakalavr’s degree. Most
require a year of research and a thesis.
• Diplom: This specialized diploma can be obtained either by
completing 1 year of study beyond the bakalavr or by completing
5 to 6 years of continuous study after upper secondary school.
• Kandidat nauk: Students who hold a diplom or magistr are
eligible to apply for these programs, which typically last for
3 years and require students to carry out independent research
and defend a dissertation in public. Equivalent of a doctorate
in the United States.
• Doktor nauk: This is the highest possible academic degree in
the Russian Federation, for which there is no U.S. equivalent.
This degree requires that a kandidat nauk gain reputation in his
or her field of study, publish independent research, and have
experience supervising undergraduates. A 3-year sabbatical is
often taken to prepare research for the degree, although there
is no specified length of time required to obtain it. The doktor
nauk requires a public dissertation defense (in addition to the
defense completed to obtain a kandidat nauk).

Comparative Indicators of Education in the United States
and Other G-8 Countries: 2011. (APPENDIX A: THE EDUCATION SYSTEMS OF THE G-8 COUNTRIES p.77) U.S. DEPARTMENT OF EDUCATION. 2011. (NCES 2012-007)