Test about "use of limited-use shared secret data"

Hi all,

While designing tests for the test collection we couldn't agree on if
the following test (or something similar) should be included or not:

(Similar to XKRSS-T2 but with shared secrets equivalent to "secret") A
client wishes to register five keys generated by the XKMS server (Key
Names: TestKey[1-5]). He sends registration requests to the XKMS service
provider using the following shared secrets: "SECRET", "sec ret", " sEC
r E  t ", "SeCrE      t" and "s ECr ET  ", for key binding
authentication. The shared secrets associated to the keys in the service
side will be the same used by the client, without an explicit order as
all of them will transform to "secret". The processing mode is
synchronous, and the keys are to be used with an email address. The XKMS
server returns an RSA key pair with encrypted private key for every
registration operation. The resulting set of messages will consist of
ten messages: five Register request/response pairs.

The idea would be to check if the string conversion rules included in
the "use of limited-use shared secret data" section would guarantee
interoperability. On the other hand, Tommy suggested that this kind of
test is not an interoperability issue as the execution of the algorithm
involves only one entity.

Does anyone have an opinion on this? :)

Cheers,
 - -Guillermo