> Actually ICSF provides both open and secure key encryption services.

Yes - mainly, those were added so that applications would have a way to use 
ICSF for clear-key encryption with the CPACF.  Those were not originally a part 
of CCA, and are not supported in the HSM cards (Crypto Express, 476x).  In 
addition, CCA has always had clear key "ENCODE" and "DECODE" verbs, but those 
were intentionally limited to encrypting just 8 bytes of data - the original 
designers wanted to discourage use of clear key encryption.

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