Use of short message service (SMS) for secure transactions
First Claim
1. A method for establishing a secure conduit for SMS communication with a wireless terminal, comprising:
- a) encrypting an authorization key in response to a first SMS message from the wireless terminal comprising a public key and a request for the authorization key;
b) sending to the wireless terminal a second SMS message comprising the encrypted authorization key;
c) decrypting a third SMS message from the wireless terminal comprising an authentication code and a request for a traffic key;
d) authenticating the third SMS message;
e) encrypting the traffic key; and
f) sending to the wireless terminal a fourth SMS message comprising the traffic key.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method is presented for establishing a secure conduit for SMS communication between a center and a wireless terminal. The center encrypts an authorization key in response to a wireless terminal'"'"'s SMS message containing a public key and a request for the authorization key, sends back to the wireless terminal an SMS message containing the encrypted authorization key, decrypts another SMS message received from the wireless terminal which contains an authentication code and a request for a traffic key, authenticates the SMS message, encrypts the traffic key, and sends to the wireless terminal another SMS message containing the traffic key.
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Citations
18 Claims
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1. A method for establishing a secure conduit for SMS communication with a wireless terminal, comprising:
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a) encrypting an authorization key in response to a first SMS message from the wireless terminal comprising a public key and a request for the authorization key;
b) sending to the wireless terminal a second SMS message comprising the encrypted authorization key;
c) decrypting a third SMS message from the wireless terminal comprising an authentication code and a request for a traffic key;
d) authenticating the third SMS message;
e) encrypting the traffic key; and
f) sending to the wireless terminal a fourth SMS message comprising the traffic key. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for establishing a secure conduit for SMS communication with a wireless terminal, comprising:
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a) first cryptographic means for encrypting an authorization key in response to a first SMS message from the wireless terminal comprising a public key and a request for the authorization key;
b) communication means for sending to the wireless terminal a second SMS message comprising the encrypted authorization key;
c) second cryptographic means for decrypting a third SMS message from the wireless terminal comprising an authentication code and a request for a traffic key;
d) upstream message authentication key means for authenticating the third SMS message; and
e) third cryptographic means for encrypting the traffic key;
wherein the communication means is also means for sending to the wireless terminal a fourth SMS message comprising the traffic key. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to establish a secure conduit for SMS communication with a wireless terminal, by:
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a) encrypting an authorization key in response to a first SMS message from the wireless terminal comprising a public key and a request for the authorization key;
b) creating a second message comprising the encrypted authorization key;
c) decrypting a third SMS message from the wireless terminal comprising an authentication code and a request for a traffic key;
d) authenticating the third SMS message;
e) encrypting the traffic key; and
f) creating a fourth message comprising the traffic key. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification