This bug was fixed in the package libica - 2.6.1-1ubuntu2

---------------
libica (2.6.1-1ubuntu2) xenial; urgency=medium

  * Cherry-pick upstream patch to stop reseeding global DRBG instance on
    every call. LP: #1608954

 -- Dimitri John Ledkov <x...@ubuntu.com>  Wed, 14 Sep 2016 14:45:19
+0100

** Changed in: libica (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1608954

Title:
  Performance degradation caused by libica2 library

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in libica package in Ubuntu:
  Fix Released
Status in libica source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bastian Pfeifer <bastian.pfei...@de.ibm.com> - 2016-07-29 
09:07:47 ==
  ---Problem Description---
  'Libica' library versions >= 2.6.0 implement a new DRBG (Deterministic Random 
Number Generator) with a unnecessary stiff reseed limit leading to performance 
degradation (factor >20) for RSA encryption via opencryptoki.  
   
  A patch is already upstream and can be found under this commit:
  
https://sourceforge.net/p/opencryptoki/libica/ci/3bcd3efb0aff364515ab9b3c39dd68fbbb1534d0/

  It will fix the issue + we will get a great performance improvement
  for the RSA encryption via opencryptoki's ICA-TOKEN.

  Contact Information = bastian.pfei...@de.ibm.com 
   
  ---uname output---
  Linux s42lp26 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:14:29 UTC 2016 
s390x s390x s390x GNU/Linux
   
  Machine Type = 2964, 701 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   na
   
  Userspace tool common name: libica version 2.6.1 
   
  The userspace tool has the following bit modes: 64-bit 

  Userspace rpm: libica2:s390x

  Userspace tool obtained from project website:  na 
   
  *Additional Instructions for bastian.pfei...@de.ibm.com:
  -Attach ltrace and strace of userspace application.

  == Comment: #2 - Ingo Tuchscherer <ingo.tuchsche...@de.ibm.com> -
  2016-08-01 06:53:45 ==

  
  == Comment: #3 - Heinz-Werner Seeck <heinz-werner_se...@de.ibm.com> - 
2016-08-02 08:19:23 ==
  'Libica' library versions >= 2.6.0 implement a new DRBG (Deterministic Random 
Number Generator) with a unnecessary stiff reseed limit leading to performance 
degradation (factor >20) for RSA encryption via opencryptoki.  
   
  A patch is already upstream and can be found under this commit:
  
https://sourceforge.net/p/opencryptoki/libica/ci/3bcd3efb0aff364515ab9b3c39dd68fbbb1534d0/

  Also attached to this bugzilla !

  It will fix the issue + we will get a great performance improvement
  for the RSA encryption via opencryptoki's ICA-TOKEN.

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