Patent ID: 8838988

Claim:
A system for preventing man-in-the-middle (MITM) attacks, the system comprising at least one computer device that performs a method comprising: forwarding a transaction-specific onetime password and a telephonic identifier to a user upon receipt of a confirmed electronic transaction from the user, wherein the telephonic identifier includes an authentication telephone number routed directly to a predetermined location; storing a set of confirmed details for the transaction, wherein the set of confirmed details includes the transaction-specific onetime password, a confirmed transaction source, and a confirmed transaction destination; in response to a telephonic communication from the user regarding the transaction, authenticating a mobile telephonic device used to initiate the telephonic communication based on a caller identification of the mobile telephonic device and the telephonic identifier; authenticating an inputted one time password entered by the user via the telephonic communication based on the forwarded transaction-specific onetime password; facilitating verbal communication of user-submitted details of the confirmed electronic transaction from the user via the telephonic communication based on the authentication, wherein the user-submitted details include a submitted transaction source and a submitted transaction destination; identifying the set of confirmed details for the transaction by reference to the transaction-specific onetime password; and verifying the transaction based on an indication via the telephonic communication and the verbal communication from the user as to whether the user-submitted details from the user match the confirmed details for the transaction.