Sponsor Key (Ktk); Terminal Based Keys - Ingenico i6780 User Manual

Figure 4 Key Architecture

Sponsor Key (KTK)

9.2
Key Name
Sponsor key (KTK,
key transfer key,
also known as
TMK)

Terminal Based Keys

9.3
Key Name
Secure Text Entry
Form Authorization
Key (PEFMK)
Clear Text Entry
Form Authorization
Key (CEFMK)
Application
Download
Authorization Key
(CDMK)
Ingenico 6780 User's Guide
Index Length Description of Key
0 16 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.
Index Length Description of Key
1 8/16 This key is loaded encrypted under the KTK.
All prompts and/or screens used for Secure
Text Entry of all applications will be
authenticated using this key if the Prompts
Authentication Key security option is set to
terminal based (0).
2 8/16 This key is loaded encrypted under the KTK.
All prompts and/or screens used for Clear Text
Entry of all applications will be authenticated
using this key if Prompts Authentication Key
security option is set to terminal based (0).
3 8/16 This key is the variant of KTK. It will be used to
verify the MAC value of the fingerprint of the
code being downloaded into the device. Code
MACing always uses the Application
Download Authorization Key.
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