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This video is claimed to reveal the closely guarded identity of one of Russian president Vladimir Putin's two daughters.

Putin has jealously guarded information about his family life since his rise to power, and is expected to be furious if this alleged breach proves accurate.

Posted on a Russian news website, the video is claimed to show Putin's 28-year-old daughter Yekaterina - who is alleged to be going by the name Katerina Vladimirovna Tikhonova.

Tikhonova is the maiden name of Putin's first wife, his daughters' mother.

The report on ATN.ua reads: "Internet, users find photos and videos of the mysterious daughter of Russian President Vladimir Putin - Catherine Tikhonova.

It says she "loves to participate in dance competitions and shows impressive acrobatics with a partner."

It comes after opposition blogger Alexei Navalny today published on his Facebook page an online report which identified Tikhonova as the head of an organization working with Moscow State University.

(Image: Getty Images)

A separate report on Wednesday by RBC, an independent multi-media holding, stated Tikhonova was among those heading a $1.7 billion project to build new University facilities but it did not make any connection between her and Putin.

Navalny wrote on his Facebook page: "RBC (they are cool!) yesterday found Putin's daughter in the Scientific Council of Moscow State University."

A source close to Moscow State University confirmed Tikhonova was Putin's daughter, telling Reuters on condition of anonymity: "Yes, it is her."

Tikhonova could not be reached for comment.

The Kremlin often brushes aside questions about Putin's private life, defending his right it privacy. Asked about the woman's identity, Kremlin spokesman Dmitry Peskov said: "I don't know who she is."

Asked whether Putin's daughter works for Moscow State University, he answered: "I don't know. It's not my job. I deal with the president, not with his children."

Putin is so secretive about his family that most Russians have no idea what his daughters look like. It is also not public knowledge where his ex-wife Lyudmila is living since their divorce was finalised last year.

Putin did, however, say in November that his daughters both live in Russia and he sees them once or twice a month.

Media reports last year said Maria had lived in the Netherlands until Malaysia Airlines flight MH17 was shot down over eastern Ukraine, killing 298 people, many of them Dutch nationals. She fled after the local mayor called for her deportation, though he later retracted his comments.

Putin's spokesman denied rumours five years ago that Yekaterina planned to marry the son of a South Korean general.

Putin and Lyudmila announced their breakup to a television interviewer in June 2013 and they formally divorced in April last year after more than 30 years of marriage.

Putin said in 2008 there was no truth to a newspaper report that he was preparing to marry Olympic rhythmic gymnast Alina Kabayeva, who was born in 1983.