This is Perl module Encode::Base58. INSTALLATION Encode::Base58 installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan Encode::Base58 Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install DOCUMENTATION Encode::Base58 documentation is available as in POD. So you can do: % perldoc Encode::Base58 to read the documentation online with your favorite pager. Tatsuhiko Miyagawa