1. A method of authenticating data, comprising: training a voice biometric system to identify a user from a message spoken by the user; requesting, by the voice biometric system, a spoken message comprising a financial transaction detail from the user, the financial transaction detail related to a financial transaction between the user and a merchant; receiving, by the voice biometric system, the spoken message from the user, the spoken message comprising word content, the word content comprising the financial transaction detail related to the financial transaction between the user and the merchant; authenticating, by the voice biometric system, the word content included in the spoken message as word content spoken by the user; and providing a result of the authentication including the authenticated word content, thereby permitting a comparison of the authenticated word content to information related to the financial transaction between the user and the merchant to provide a degree of confidence that the financial transaction is not fraudulent.
1. A method of authenticating data, comprising: training a voice biometric system to identify a user from a message spoken by the user; requesting, by the voice biometric system, a spoken message comprising a financial transaction detail from the user, the financial transaction detail related to a financial transaction between the user and a merchant; receiving, by the voice biometric system, the spoken message from the user, the spoken message comprising word content, the word content comprising the financial transaction detail related to the financial transaction between the user and the merchant; authenticating, by the voice biometric system, the word content included in the spoken message as word content spoken by the user; and providing a result of the authentication including the authenticated word content, thereby permitting a comparison of the authenticated word content to information related to the financial transaction between the user and the merchant to provide a degree of confidence that the financial transaction is not fraudulent. 9. The method as claimed in claim 1 , wherein the financial transaction detail comprises one or more of: a value of the financial transaction between the user and the merchant; and an identification of a party to the financial transaction other than the user, or a proxy for the user.