The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

• This week’s question: Is ‘ripen at home’ fruit the supermarkets’ idea of a joke?

I’ve been struggling to get my head around the idea that a passkey, which can be a pin on your phone, or facial recognition, can be safer than using a complicated password and two-factor authentication.

I get that having something unique to your device, not stored on a company’s server, is unphishable and less hackable by cybercrims, but what if your phone is nicked and someone guesses the password? And what if you lose your phone?

Lead brand of French luxury group LVMH reassures customers financial data such as bank details were not taken

Louis Vuitton has said the data of some UK customers has been stolen, as it became the latest retailer targeted by cyber hackers.

The retailer, the leading brand of the French luxury group LVMH, said an unauthorised third party had accessed its UK operation’s systems and obtained information such as names, contact details and purchase history.