System and method for dynamic multifactor authentication

1. A computer-readable non-transitory medium having stored thereon a sequence of instructions which when executed by a mobile device of a user cause the mobile device to:

receive, from an access terminal that is in communication with a remote authentication device, a first piece of authentication information, by capturing an image using a digital camera of the mobile device, wherein the first piece of authentication information comprises an encrypted message and is presented as said image on a display of the access terminal;

decrypt the encrypted message;

generate a second piece of authentication information which is at least partially based on at least a portion of the decrypted message;

send the second piece of authentication information to the remote authentication device;

wherein the first piece of authentication information contains transactional information related to a transaction which the user wishes to make.

2. The computer-readable non-transitory medium of claim 1 wherein said instructions when executed by the mobile device further cause the mobile device to generate the second piece of authentication information by using one of International Mobile Equipment Identity (IMEI), information relating to the Subscriber Identity Module (SIM) or information specific to the mobile device of the user.

3. The computer-readable non-transitory medium of claim 1 , wherein the second piece of authentication information comprises biometric data.

4. The computer-readable non-transitory medium of claim 1 , wherein the second piece of authentication information comprises information relating to the location of the mobile device.

5. A computer-readable non-transitory medium having stored thereon a sequence of instructions which when executed by a mobile device of a user cause the mobile device to:

receive a first piece of authentication information that is presented as an image on a display of an access terminal that is a different device than the mobile device by using a digital camera of the mobile device to capture said image, wherein the first piece of authentication information contains transactional information related to a transaction which the user wishes to make and wherein the first piece of authentication information comprises an encoded and encrypted message;

generate a second piece of authentication information which is at least partially based on the received first piece of authentication information, said second piece of authentication information for transmission to a remote authentication device and validation by said remote authentication device.

6. The computer-readable non-transitory medium of claim 5 wherein said instructions when executed by the mobile device further cause the mobile device to authenticate the source of the captured image.

7. The computer-readable non-transitory medium of claim 5 wherein said instructions when executed by the mobile device further cause the mobile device to communicate to the user a second message contained in the first piece of authentication information.

8. The computer-readable non-transitory medium of claim 5 wherein said instructions when executed by the mobile device further cause the mobile device to sign said second message contained in the first piece of authentication information.

9. The computer-readable non-transitory medium of claim 8 wherein said second message comprises said transactional information and the mobile device signing said message is conditional on the user accepting the transaction described in the message.

10. The computer-readable non-transitory medium of claim 5 wherein said instructions when executed by the mobile device further cause the mobile device to sign a third message contained in the first piece of authentication information.

11. The computer-readable non-transitory medium of claim 10 wherein said instructions when executed by the mobile device further cause the mobile device to send said signed third message to the remote authentication device.

12. The computer-readable non-transitory medium of claim 5 wherein said instructions when executed by the mobile device further cause the mobile device to decrypt and decode said message.

13. The computer-readable non-transitory medium of claim 12 wherein said encrypted and encoded message comprises said transactional information.

14. The computer-readable non-transitory medium of claim 12 wherein said instructions when executed by the mobile device further cause the mobile device to communicate to the user said decrypted and decoded message.

15. The computer-readable non-transitory medium of claim 12 wherein said instructions when executed by the mobile device further cause the mobile device to sign said message.

16. The computer-readable non-transitory medium of claim 14 wherein said message comprises said transactional information and wherein said instructions when executed by the mobile device further cause the mobile device to sign said message if the user accepts the transaction described in the message.

17. The computer-readable non-transitory medium of claim 5 wherein causing the mobile device to generate the second piece of authentication information comprises causing the mobile device to include in the second piece of authentication information a function of at least a portion of the first piece of authentication information.

18. The computer-readable non-transitory medium of claim 5 , wherein generating the second piece of authentication information comprises using information specific to the mobile device of the user.

19. The computer-readable non-transitory medium of claim 18 , wherein the information specific to the mobile device of the user comprises a cryptographic key.

20. The computer-readable non-transitory medium of claim 5 , wherein the second piece of authentication information comprises biometric data.

21. The computer-readable non-transitory medium of claim 5 wherein said instructions when executed by the mobile device further cause the mobile device to provide information relating to the location of the mobile device for use in said validation.

22. A computer-readable non-transitory medium having stored thereon a sequence of instructions which when executed by a mobile device of a user cause the mobile device to:

receive a first piece of authentication information which contains transactional information related to a transaction which the user wishes to make;

use a digital camera comprised in the mobile device to capture, from the display of an access terminal that is a different device than the mobile device, an image that is displayed on said display of said access terminal;

process said image to obtain an encoded and encrypted message;

decode and decrypt said encoded and encrypted message to retrieve said transactional information related to a transaction which the user wishes to make;

display said transactional information to the user;

generate a second piece of authentication information which is at least partially based on the first piece of authentication information.

23. The computer-readable non-transitory medium of claim 22 wherein said mobile device comprises a dedicated hardware token.

24. The computer-readable non-transitory medium of claim 22 wherein the mobile device is a mobile phone.

25. The computer-readable non-transitory medium of claim 22 wherein said instructions when executed by the mobile device further cause the mobile device to authenticate the source of said image.

26. The computer-readable non-transitory medium of claim 22 wherein said instructions when executed by the mobile device further cause the mobile device to generate said second piece of authentication information using information specific to the mobile device.

27. The computer-readable non-transitory medium of claim 26 wherein the information specific to the mobile device includes an encryption key.

28. The computer-readable non-transitory medium of claim 22 wherein said instructions when executed by the mobile device further cause the mobile device to sign said message.

29. The computer-readable non-transitory medium of claim 22 wherein the first piece of authentication information further comprises an authentication code.

30. The computer-readable non-transitory medium of claim 22 wherein said instructions when executed by the mobile device further cause the mobile device to display to the user a code comprised in the message.

31. The computer-readable non-transitory medium of claim 22 wherein said instructions when executed by the mobile device further cause the mobile device to send the second piece of authentication information to a remote authentication device.

32. The computer-readable non-transitory medium of claim 22 wherein the second piece of authentication information comprises biometric data.

33. The computer-readable non-transitory medium of claim 32 wherein the second piece of authentication information comprises at least a partial fingerprint of at least one of the user's fingers.

34. The computer-readable non-transitory medium of claim 22 wherein said instructions when executed by the mobile device further cause the mobile device to use at least a part of a fingerprint of the user scanned by a finger print scanner comprised in the mobile device.

35. The computer-readable non-transitory medium of claim 22 wherein the second piece of authentication information comprises information relating to the location of the mobile device.