In an array of groups of cryptographic processors, the processors in each group operate together but are securely connected through an external shared memory. Preferred examples of such delta receptor agonist compound include diarylmethyl piperazine compounds and diarylmethyl piperidine compounds, and pharmaceutical compositions thereof, having utility in medical therapy for reducing respiratory depression associated with certain analgesics, such as mu opiates. The invention further provides methods of producing transgenic plants which are capable of bearing seedless fruits andor pollenless flowers.