Formal Analysis of SET and NSL Protocols Using the Interpretation Functions-Based Method

Table 21

A Secure version of the SET protocol.

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1. 𝐶→𝑀∶𝐶,𝑁_𝑐

2. 𝑀→𝐶∶{𝑀,𝐶,𝑋𝐼𝐷,𝑁_𝑐,𝑁_𝑀,𝐶𝐴(𝐺)}_𝑘𝑀⁻¹

3. 𝐶→𝑀∶𝑂𝐼,𝐷𝑢𝑎𝑙𝑆𝑖𝑔𝑛,{𝑃𝐼}_𝑘𝐺

4. 𝑀→𝐺∶{{𝐴𝑢𝑡ℎ𝑅𝑒𝑞𝐷𝑎𝑡𝑎,𝐿𝑖𝑛𝑘𝑂𝐼𝑃𝐼}_𝑘𝑀⁻¹}_𝑘𝐺,𝐷𝑢𝑎𝑙𝑆𝑖𝑔𝑛,

     {𝑃𝐼}_𝑘𝐺

5. G→M∶{{M,C,XID,AuthRRTags,PurchAmt,

      AuthCode}_k⁻¹_G}_kM

𝟓^′. 𝐆→𝐌∶{{𝐌,𝐗𝐈𝐃,𝐀𝐮𝐭𝐡𝐑𝐑𝐓𝐚𝐠𝐬,𝐀𝐮𝐭𝐡𝐂𝐨𝐝𝐞}_𝐤𝐆^−𝟏}_𝐤𝐌,

     {{𝐌,𝐂,𝐗𝐈𝐃,𝐏𝐮𝐫𝐜𝐡𝐀𝐦𝐭,𝐀𝐮𝐭𝐡𝐂𝐨𝐝𝐞}_𝐤𝐆^−𝟏}_𝐤𝐌

6. 𝑀→𝐶∶{𝑀,𝐶,𝑋𝐼𝐷,𝑁_𝐶,𝐴𝑢𝑡ℎ𝐶𝑜𝑑𝑒}_𝑘𝑀⁻¹

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