A Whitehall course claims GCHQ, Britain's digital surveillance agency, has concerns over software from Kaspersky Lab, handed out for free to about two million people.
If those customers happen to work for the British military or government, the spooks fear, Kaspersky's software might help the Russian intelligence services gain access to their information.
Barclays, which has offered free subscriptions of the software to users of its online banking services since 2008, is now seeking to end its arrangement with Kaspersky for commercial reasons and has stated that this move has no connection with GCHQ's concerns. However, a Barclays' spokesman disputed the figure, stating it had provided the software to around 290,000 customers over the past decade.
Both Barclays and GCHQ have stated that neither organisation has been in contact with the other about any potential breaches.
Besides, the Financial Times added that "no evidence suggests that any data of Barclays customers have been compromised by use of Kaspersky software on their computers".
Kaspersky denies the allegations and said it did not have "inappropriate ties with any government".
'The NCSC is not a regulator and does not mandate or ban any products.
'Our certification schemes do not now cover anti-virus or anti-malware services'.
The NCSC, a GCHQ arm that deals with the private sector, told the newspaper that it "has never advised Barclays against the use of Kaspersky products".
Russian cybersecurity company Kaspersky Lab hopes to continue its cooperation with Barclays despite accusations that the former has been spying on the London-based bank's customers, the company's General Manager in the United Kingdom and Ireland, Adam Maskatiya, told Sputnik on Monday.