> For the complete documentation index, see [llms.txt](https://sandbox-docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandbox-docs.verifone.com/s-adk-5.1-programmers-guide/readme/namespaces/namespacemembers/namespacemembers_eval/namespacemembers_eval_k.md).

# k

* KCV : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4aff9dfc983d63e8e734c953829d5db5f5)
* KEEP\_IN\_BACKGROUND : [vfimac](/s-adk-5.1-programmers-guide/readme/modules/group__mac/namespacevfimac.md#a3d1d0138ae66b9a9e03ae518de7ecf63a365b0d10413f98eb889815324f8baa8c)
* KEK\_FLAG : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4a3677d959091614d8176d7ce6b5fba6e1)
* KEY\_ACTION : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4ae537a2f935f8da27d63b3d5149e0969a)
* KEY\_CODE : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4a8963a78429587c0a9f1785c16fa40941)
* KEY\_DATA : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4aea863d5c0bf42bf5a17344c6ffd25e1b)
* KEY\_RELEVANT\_INFO : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4a459aa224d6c75c306f1e53a3f5751e70)
* KEY\_SERIAL\_NUMBER : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4a9121dcac23b65a97e2a534c0ce71e4a0)
* KEY\_SET\_ID : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4a04bb62b7bf4014b2cc7458cd78152e1e)
* KEY\_TYPE : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#ac9842112c341daedac40f79bbfdd65a4a44496a73681830274c7dda40ec86172b)
* KEY\_TYPE\_\_INVALID\_E : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbaa2678cce73d51c8593a4b32f06e863f6)
* KEY\_TYPE\_ACQ\_SESSION\_KEYS : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbaf79e0ff7580875d9bdcf4d10225779c7)
* KEY\_TYPE\_ACQUIRER\_MK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba478004f6fb9430b21c56edae85c50a90)
* KEY\_TYPE\_CERT : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba3a40bbfe0fae7cd1418c9eeb94541ebf)
* KEY\_TYPE\_DDK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba06ba2d0d2a433b018b9bce5a7b703ed6)
* KEY\_TYPE\_DEK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba93b5ecc6254c9553998b5b503c5565c2)
* KEY\_TYPE\_DELETE\_ALL\_CUST\_KEYS : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbaa7c42d56623245fd2f3f0befa0cb47f6)
* KEY\_TYPE\_DELETE\_ALL\_KEYS : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba331d442daf2746bf9d60b3709ec314c3)
* KEY\_TYPE\_DELETE\_SYS\_KEY : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba9a7f2b8cd3918549fa78db39c4f93a68)
* KEY\_TYPE\_DIRECT\_AUTHEX\_ENC : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba9edf634d7c59ddb63f033e7f91dc7771)
* KEY\_TYPE\_DIRECT\_AUTHEX\_SYSK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbaa50da1d301fd48e8e21e10ba499737d5)
* KEY\_TYPE\_DIRECT\_CUSTOM\_ASYM : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba95a6b8bab845cce0b7d7ea0fc6cabb3f)
* KEY\_TYPE\_DIRECT\_CUSTOM\_ASYM\_SYSK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbaa2f6a2eeb244c7f15e35d4962b0d651c)
* KEY\_TYPE\_DIRECT\_MK\_ENC : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba5ba1a7e32fb7aff0a6c8595f3748b418)
* KEY\_TYPE\_DIRECT\_MK\_PLAIN : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba2623446657a3abaaa477ae31aae03538)
* KEY\_TYPE\_DIRECT\_SYSK\_ENC : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba5692ffc7bfa4e0a25d8dc3483ec353f9)
* KEY\_TYPE\_DIRECT\_SYSK\_PLAIN : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbadb06bfd0ecb8cbef74ed51861c2aecd4)
* KEY\_TYPE\_DUKPT : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba7d6a499d7761faab2f2af90b7adc6f3e)
* KEY\_TYPE\_ENC\_KI\_FMT\_0 : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbae6cfdb89bd03c0a2199f28e16fec0ee7)
* KEY\_TYPE\_ENC\_KI\_FMT\_1 : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbabc5fb023d8d677e74d3b48545563a952)
* KEY\_TYPE\_ENC\_KI\_FMT\_2 : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbacbe0d7ac6481e5ab5ba76f9743313374)
* KEY\_TYPE\_ENC\_PPASN : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba87086d37574db21a706727ea790a3c08)
* KEY\_TYPE\_ENC\_PPID : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba3bfba7d3da9d84c4e5a17dbb531a2264)
* KEY\_TYPE\_KEK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba768d13fac4b43aa792f2b529636ee45f)
* KEY\_TYPE\_KVC\_KEK1 : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba824c4c6708c37969db4828faf327aca9)
* KEY\_TYPE\_KVC\_KIA : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbae255a9df4e1aaefbc9366de3f8065d60)
* KEY\_TYPE\_MGK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba793c57ed813cdc0fcadd9a1e5d175bbc)
* KEY\_TYPE\_MVK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba7221a6157a4a90491547f38975a9ebcf)
* KEY\_TYPE\_PPK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba508471c3ad9204286222065b5adb9f23)
* KEY\_TYPE\_SEC\_ACQ\_KI : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbaa1b0414e11ad93eea0ed683e5f71817f)
* KEY\_TYPE\_SEC\_ACQ\_MK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba72ac58fd195ecf7c7217bea4a6ff2a23)
* KEY\_TYPE\_SPONSOR\_KI : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba09f2a46c0323886f3c0972645d766899)
* KEY\_TYPE\_SPONSOR\_MK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbab35dea27712284a2c1a7304978a22b29)
* KEY\_TYPE\_SPONSOR\_PK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba703240f5f7a5e5250fb0c500718e4ae7)
* KEY\_TYPE\_TCU\_PK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cbafde71a7e88381351a90819d189395595)
* KEY\_TYPE\_TMK : [com\_verifone\_host](/s-adk-5.1-programmers-guide/readme/namespaces/namespacecom__verifone__host.md#ab6420af507afd2c6a57f725ad69d11cba97fca93a5b7ec4aedee7149073db751e)
* KEYBOARD\_TYPE\_ARABIC : [vfisysinfo](/s-adk-5.1-programmers-guide/readme/modules/group__led/namespacevfisysinfo.md#a7eb335c3825953082e42dc209ff04c05a12010cf06ac4d0a0f5234827c518b292)
* KEYBOARD\_TYPE\_EBS100 : [vfisysinfo](/s-adk-5.1-programmers-guide/readme/modules/group__led/namespacevfisysinfo.md#a7eb335c3825953082e42dc209ff04c05a978234c216689c385c8f440e0582321f)
* KEYBOARD\_TYPE\_RNIB : [vfisysinfo](/s-adk-5.1-programmers-guide/readme/modules/group__led/namespacevfisysinfo.md#a7eb335c3825953082e42dc209ff04c05a2c89dec7f1e43a3b353030718c27deea)
* KEYBOARD\_TYPE\_STANDARD : [vfisysinfo](/s-adk-5.1-programmers-guide/readme/modules/group__led/namespacevfisysinfo.md#a7eb335c3825953082e42dc209ff04c05afae94da55d3356c5333f374b839a7d8c)
* KEYBOARD\_TYPE\_UNKNOWN : [vfisysinfo](/s-adk-5.1-programmers-guide/readme/modules/group__led/namespacevfisysinfo.md#a7eb335c3825953082e42dc209ff04c05a6207fa417a81b4d72b69d00559f2ad2c)
* KEYPAD\_LED : [vfisysinfo](/s-adk-5.1-programmers-guide/readme/modules/group__led/namespacevfisysinfo.md#ab6831a7d06c0a2bc69f9b024f6445a80a27f5f55a7254ef7dbb9907f51ef0ddc6)
* KSN\_E2E : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#add4280440188ede2e1f6ea4397df6cfaa925e7fc81e7e3a9a1b62755f2ffa9b88)
* KSN\_PED : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#add4280440188ede2e1f6ea4397df6cfaa5ce820776ed5079963373c85e7fe92cd)
* KSN\_SRED : [vfisdi](/s-adk-5.1-programmers-guide/readme/namespaces/namespacevfisdi.md#add4280440188ede2e1f6ea4397df6cfaa8da62d6be2f10ca11bd06ad14e8e99b9)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://sandbox-docs.verifone.com/s-adk-5.1-programmers-guide/readme/namespaces/namespacemembers/namespacemembers_eval/namespacemembers_eval_k.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.