Method, apparatus, and computer program product for secure two-factor authentication
Various methods are provided for secure two-factor authentication, and more specifically, for incorporating a layer of security to two-factor authentication using Short Message Service in a manner virtually transparent to the end-user. Methods may include receiving a request for registration for two-factor authentication from a client including a username and password; providing a request for a mobile device number; receiving the mobile device number and a pre-shared key; sending to a mobile device an identity of the client and a server key share; receiving from the mobile device a mobile device key share; sending information corresponding to an exchange with the mobile device and a challenge derived from the pre-shared key to the client in response to the device key share corresponding to the server key share; receiving confirmation of registration with the mobile device; and establishing a shared key in response to verification of the confirmation.
1. An apparatus comprising at least one processor and at least one non-transitory memory including computer program code instructions, the computer program code instructions configured to, when executed, cause the apparatus to at least:
receive a request for registration for two-factor authentication from a client;
receive a username and password;
provide a request for a mobile device number in response to the username and password corresponding to an account;
receive the mobile device number and a pre-shared key;
send, to a mobile device corresponding to the mobile device number, an identity of the client and a server key share;
receive, from the mobile device, a device key share;
send information corresponding to an exchange with the mobile device and a challenge derived from the pre-shared key to the client in response to the device key share corresponding to the server key share;
receive, from the client, confirmation of registration with the mobile device;
establish a shared key in response to verification of the confirmation;
receive an access request including the username and password;
select a random string;
transmit the random string to the mobile device via short message service (SMS);
receive a one-time password from the mobile device derived from the random string, wherein the one-time password is derived by computing a Media Access Control (MAC) address and truncating the MAC address to obtain the one-time password; and
allow the access request in response to the one-time password corresponding to the random string based on the shared key.
2. The apparatus of claim 1 , wherein the mobile device number and the pre-shared key are received over a transport layer security (TLS) encrypted channel.
3. The apparatus of claim 1 , wherein the shared key is used for two-factor authentication of the username and password for subsequent login.
4. The apparatus of claim 1 , wherein the apparatus is further caused to provide information to the client encrypted with the shared key.
5. The apparatus of claim 1 , wherein the MAC address is computed from the shared key.
6. A computer program product comprising at least one non-transitory computer-readable storage medium having computer-executable program code instructions stored therein, the computer-executable program code instructions comprising program code instructions to:
receive a request for registration for two-factor authentication from a client;
receive a username and password;
provide a request for a mobile device number in response to the username and password corresponding to an account;
receive the mobile device number and a pre-shared key;
send, to a mobile device corresponding to the mobile device number, an identity of the client and a server key share;
receive, from the mobile device, a device key share;
send information corresponding to an exchange with the mobile device and a challenge derived from the pre-shared key to the client in response to the device key share corresponding to the server key share;
receive from the client, confirmation of registration with the mobile device;
establish a shared key in response to verification of the confirmation;
receive an access request including the username and password;
select a random string;
transmit the random string to the mobile device via short message service (SMS);
receive a one-time password from the mobile device derived from the random string, wherein the one-time password is derived by computing a Media Access Control (MAC) address and truncating the MAC address to obtain the one-time password; and
allow the access request in response to the one-time password corresponding to the random string based on the shared key.
7. The computer program product of claim 6 , wherein the mobile device number and the pre-shared key are received over a transport layer security (TLS) encrypted channel.
8. The computer program product of claim 6 , wherein the shared key is used for two-factor authentication of the username and password for subsequent login.
9. The computer program product of claim 6 , further comprising program code instructions to provide information to the client encrypted with the shared key.
10. The computer program product of claim 6 , wherein the MAC address is computed from the shared key.
11. A method for registering two-factor authentication comprising:
receiving a request for registration for two-factor authentication from a client;
receiving a username and password;
providing a request for a mobile device number in response to the username and password corresponding to an account;
receiving the mobile device number and a pre-shared key;
sending, to a mobile device corresponding to the mobile device number, an identity of the client and a server key share;
receiving, from the mobile device, a device key share;
sending information corresponding to an exchange with the mobile device and a challenge derived from the pre-shared key to the client in response to the device key share corresponding to the server key share;
receiving from the client, confirmation of registration with the mobile device;
establishing shared key in response to verification of the confirmation;
receiving an access request including the username and password;
selecting a random string;
transmitting the random string to the mobile device via short message service (SMS);
receiving a one-time password from the mobile device derived from the random string, wherein the one-time password is derived by computing a Media Access Control (MAC) address and truncating the MAC address to obtain the one-time password; and
allowing the access request in response to the one-time password corresponding to the random string based on the shared key.
12. The method of claim 11 , wherein the mobile device number and the pre-shared key are received over a transport layer security (TLS) encrypted channel.
13. The method of claim 11 , wherein the shared key is used for two-factor authentication of the username and password for subsequent login.
14. The method of claim 11 , further comprising providing information to the client encrypted with the shared key.
15. The method of claim 11 , wherein the MAC address is computed from the shared key.