The IMB also advises shipping companies to closely examine the papers of crew and masters, thousands of whom carry forged documents. In 54 maritime administrations surveyed in 2001 by the Seafarers' International Research Centre, Cardiff University in Wales, more than 12,000 cases of forged certificates of competency were unearthed. Many issuing authorities are either careless or venal or both. The IMB accused the Coast Guard Office of Puerto Rico for issuing 500 such "suspicious" certificates. The Chinese customs and navy - especially along the southern coast - have often been decried for working hand in glove with pirates. False documents are an integral - and crucial - part of maritime piracy. The IMB says: "Many of the phantom ships that set off to sea with a cargo and then disappear are sailed by crewmen with false passports and competency certificates. They usually escape detection by the port authorities. In a recent case of a vessel located and arrested in South-East Asia further to IMB investigations, it has emerged that all the senior officers had false passports. The ship's registry documents were also false". As documents go electronic and integrated in proprietary or common cargo tracking systems, such forgery will wane. Bolero - an international digital bill of lading ledger - is backed by the European Union, banks, shipping and insurance companies. The IMO is a proponent of a technology to apply encrypted "digital signatures" to electronic bills of lading. Still, the industry is highly fragmented and many ships and ports don't even possess rudimentary information technology. The protection afforded by the likes of Bolero is at least five years away. Pirates sometimes work hand in hand with conspiring crew members (or, less often, stowaways). In many countries - in East Asia, Latin America, and Africa - Coast Guard operatives, corrupt drug agents, and other law enforcement officials, moonlight as pirates. Renegade members of British trained Indonesian anti-piracy squads are still roaming the Malacca Straits. Pirates also enjoy the support of an insidious and vast network of suborned judges and bureaucrats. Local villagers along the coasts of Indonesia and Malaysia - and Africa - welcome pirate business and provide the perpetrators with food and shelter. Moreover, large tankers, container ships, and cargo vessels are largely computerized and their crew members few. The value of an average vessel's freight has increased dramatically with improvements in container and oil storage technologies. "Flag of convenience" registration has assumed monstrous proportions, allowing ship owners and managers to conceal their identity effectively. Belize, Honduras, and Panama are the most notorious, no questions asked, havens. Piracy has matured into a branch of organized crime.