Laura Kuenssberg was seen at the conference in Brighton accompanied by a shaven-headed man identified by the paper as a former soldier employed by the BBC to protect her.
The journalist, the British Broadcasting Corporation's first female political editor, has been the target of sexist abuse.
She is also regularly attacked on websites, such as The Canary, which support Labour leader Jeremy Corbyn.
An online petition for her to be sacked last year garnered 35,000 signatures before being taken down.
Ms Kuenssberg has also been accused of partiality by members of Prime Minister Theresa May's Conservative Party and the UK Independence Party (UKIP).
A BBC insider was quoted by The Sun newspaper on Sunday as saying: "We take the safety of our staff extremely seriously."
"Laura is a well-known public figure. She and her team will be covering events with big crowds where there can be hostility, so we want to ensure adequate precautions are taken."
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
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