[gmontes]

debes leer el readme que trae el zip para su correcta instalacion

copiaste el archivo UTF8Sec.dll a ..\%WINDIR%\system(32) ??
como se indica


To install the components within Delphi (v2) copy all these files to a separate
directory of your choice, start Delphi and select Component | Install ... from
the menus. In the upcoming dialog click Add, then Browse (or simply Browse in
later versions) to select the PGP2Comp and X509Comp units from the directory
you put them in. After clicking the appropriate OK buttons the components
will be installed on separate pages of the components palette. In Delphi 6 you
can do it the same way, whereas in Delphi 2005 you have to load PGP.dpk into the
IDE, compile it and install it via right clicking PGP.bpl in the project tree
and selecting the proper menu entry.
UTF8Sec.dll has to be copied to a commonly accessible directory like
..\%WINDIR%\system(32) on your machine for installing these components
within Delphi. Don't forget to distribute a copy of this library with your
application(s) using these components!