DB2 10.5 for Linux, UNIX, and Windows

IBM Global Security Kit installation instructions for AIX

The IBM® Global Security Kit (GSKit) installation must be performed as the user root.

The GSKit install media must be accessible to the installation programs. Although the SMIT program can access the install media via a read-only device (such as a CD-ROM), the best method is to copy the GSKit media to the local file system first. A good place for this is /var/spool/pkg or alternatively /tmp/gsk8.

The AIX® packages are distributed in a compressed tar file. To gain access to the software packages that will be recognized by native install tools you first need to uncompress them. This can be achieved as follows:
zcat package.tar.Z | tar -xf -
For example, to uncompress the 64-bit GSKit Crypt package run the following command:
zcat gskcrypt64-8.0.13.aix.ppc.tar.Z | tar -xf - 

For GSKit Crypt 64-bit GSKit8.gskcrypt64.ppc.rte would be the decompressed file. The installation instructions assume that you have decompressed the installation packages and are working with them directly.