Figure 4 Key Architecture
9.2Sponsor Key (KTK)
Key Name |
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| Index |
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| Length |
Sponsor key (KTK, |
| 0 |
| 16 | ||
key transfer key, |
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also known as |
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TMK) |
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Description of Key
This key will be loaded as clear text. All Level 2 keys will be transferred to the debit terminal encrypted under this key. A default key is set if no customer key is injected.
9.3Terminal Based Keys
| Key Name | Index | Length |
| Description of Key |
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| Secure Text Entry | 1 | 8/16 |
| This key is loaded encrypted under the KTK. |
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| Form Authorization |
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| All prompts and/or screens used for Secure |
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| Key (PEFMK) |
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| Text Entry of all applications will be |
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| authenticated using this key if the Prompts |
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| Authentication Key security option is set to |
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| terminal based (0). |
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| Clear Text Entry | 2 | 8/16 |
| This key is loaded encrypted under the KTK. |
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| Form Authorization |
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| All prompts and/or screens used for Clear Text |
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| Key (CEFMK) |
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| Entry of all applications will be authenticated |
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| using this key if Prompts Authentication Key |
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| security option is set to terminal based (0). |
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| Application | 3 | 8/16 |
| This key is the variant of KTK. It will be used to |
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| Download |
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| verify the MAC value of the fingerprint of the |
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| Authorization Key |
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| code being downloaded into the device. Code |
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| (CDMK) |
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| MACing always uses the Application |
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| Download Authorization Key. |
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Ingenico 6500 User’s Guide |
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| 93 | |||
