Online payment service PayPal has put an additional security step in place for UK customers.
The SMS Security Key code is an additional temporary password sent to users via text message.
On top of entering the standard username and password, PayPal customers signed up to the optional service are required to enter the Security Key code at login.
After login the code expires and no one else can use it.
Customers who don’t own a mobile phone can purchase a Security Key Token for £3, designed to be carried on a key ring.
The token creates a new security code every 30 seconds. Users enter the latest code alongside their password at login.
Again, after login the code expires.
PayPal said the two optional Security Keys have been introduced to protect customers against online fraud.
PayPal’s head of risk management, Garreth Griffith, said: “Successful fraud attacks on PayPal accounts are very rare.
“But we know that some people want extra reassurance, and that’s what the PayPal Security Key will offer.
“It’s like a combination lock for your account – designed to let you in and keep others out, with the extra safeguard that the combination always changes.”