| 摘要 |
According to some embodiments, a registration request is received from a user, the user providing information identifying an account. A transaction database is queried using the information identifying an account, and a set of transactions conducted using the account are identified, each of the transactions having at least one transaction detail field. The set of transactions is presented to said user with at least one of the transaction detail fields being redacted. The user is prompted to provide the at least one of the redacted transaction detail fields, and a determination is made whether to authenticate the user based on a response of the user.
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