Method for managing a transaction, corresponding server, computer program product and storage medium

1. A method of managing at least one transaction implemented by an electronic payment terminal having a magnetic stripe reader for reading a paycard of a user, wherein the method comprises:

the following acts implemented in a secured intermediate server:

receiving, from said electronic payment terminal, at least one transaction message carrying at least one piece of data of said payment card of said user, read by said magnetic stripe reader and encrypted by said electronic payment terminal, and at least one identifier of a mobile communications terminal of said user;

sending, to said mobile communications terminal corresponding to said identifier, at least one transaction validation request message carrying at least one piece of information representing said transaction;

receiving, from said mobile communications terminal corresponding to said identifier, at least one validation message carrying at least one response to said validation request message; and

managing said transaction when said response is positive;

an act of securing said transaction comprising the following sub-acts:

transmission of at least one securing code, by a server of a bank organization corresponding to said bank card of said user, to said mobile communications terminal; and

reception by said secured intermediate server of said securing code coming from said mobile communications terminal;

and the following acts implemented by said mobile communications terminal of said user:

loading of a multimedia application;

reception and processing by the multimedia application of the transaction validation request message;

reception of said securing code and insertion of said securing code into said validation message; and

display, on the mobile communications terminal of said user, of a user interface presenting the user with a validation; and

transmission, to said secured intermediate server, of said validation message when the user has accepted the transaction via said validation.

2. The method of managing at least one transaction according to claim 1 , wherein the method comprises, when said transaction is finalized, an act of transmitting at least one transaction finalizing message intended for said electronic payment terminal and at least one transaction finalizing message intended for said mobile communications terminal of said user.

3. The method of managing at least one transaction according to claim 1 , wherein said transaction validation request message corresponds to an SMS or email type message.

4. A secured intermediate server for implementing a method of managing at least one transaction implemented by an electronic payment terminal presenting a magnetic stripe reader for the reading of a paycard of a user, the secured intermediate server comprising:

a non-transitory computer-readable medium comprising instructions stored thereon; and

a processor configured by the instructions to perform acts comprising:

receiving at least one transaction message from said electronic payment terminal, the transaction message carrying at least one piece of data on said paycard of said user read by said magnetic stripe reader and encrypted by said electronic payment terminal and at least one identifier of a mobile communications terminal of said user;

sending at least one transaction validation request message to said mobile communications terminal corresponding to said identifier, said transaction validation request message carrying at least one piece of information representing said transaction;

receiving, from said mobile communications terminal corresponding to said identifier, at least one validation message carrying at least one response to said validation request message;

reception, from said mobile communications terminal, of a securing code; and

managing said transaction when said response is positive.

5. A computer-readable and non-transient storage medium storing a computer program comprising a set of instructions executable by a computer or a processor of a secured intermediate server to implement a method of managing at least one transaction implemented by an electronic payment terminal presenting a magnetic stripe reader for the reading of a paycard of a user, wherein the instructions configure the secured intermediate server to perform the following acts when executed by the computer or processor:

receiving at least one transaction message from said electronic payment terminal, the transaction message carrying at least one piece of data on said paycard of said user read by said magnetic stripe reader and encrypted by said electronic payment terminal and at least one identifier of a mobile communications terminal of said user;

sending at least one transaction validation request message to said mobile communications terminal corresponding to said identifier, said transaction validation request message carrying at least one piece of information representing said transaction;

receiving, from said mobile communications terminal corresponding to said identifier, at least one validation message carrying at least one response to said validation request message;

receiving a securing code from said mobile communications terminal; and

managing said transaction when said response is positive.