Agencies like the NSA are currently able to eavesdrop on anyone with few restrictions only - though other messages are spread by the NSA.
Theoretically cryptography can make that difficult. Hence those agencies speak up for actions like introducing trapdoors to make it possible to get access to everybody's data.
See the U.S. discussion about the Clipper Chip some years ago:
While encryption offers us privacy for the transmission of data, we do not only wish to have it but also need it if we want to transport data which shall not be seen by anyone else but the recipient of our message. Given this, the governments and governmental institutions/organizations fear to lose control. Strict laws are the consequence. The often repeated rumor that the Internet was a sphere of illegality has been proven wrong. Some parts are controlled by law very clearly. One of them is cryptography. Prohibition of cryptography or at least its restriction are considered an appropriate tool against criminality. Or one should say: had been considered that. In the meantime also governmental institutions have to admit that those restrictions most of all work against the population instead against illegal actors. Therefore laws have been changed in many states during the last five years. Even the USA, the Master of cryptography-restriction, liberated its laws in December 1999 to be more open-minded now.
for an insight into the discussion having gone on for years see:
the final text of the new U.S. Encryption Regulations you will find under:
an explanation of the regulations can be found under:
TEXTBLOCK 1/2 // URL: http://world-information.org/wio/infostructure/100437611776/100438659102
TEXTBLOCK 2/2 // URL: http://world-information.org/wio/infostructure/100437611795/100438659138
The World Intellectual Property Organization is one of the specialized agencies of the United Nations (UN), which was designed to promote the worldwide protection of both industrial property (inventions, trademarks, and designs) and copyrighted materials (literary, musical, photographic, and other artistic works). It was established by a convention signed in Stockholm in 1967 and came into force in 1970. The aims of WIPO are threefold. Through international cooperation, WIPO promotes the protection of intellectual property. Secondly, the organization supervises administrative cooperation between the Paris, Berne, and other intellectual unions regarding agreements on trademarks, patents, and the protection of artistic and literary work and thirdly through its registration activities the WIPO provides direct services to applicants for, or owners of, industrial property rights.
b. July 13, 1527, London, England
d. December 1608, Mortlake, Surrey
English alchemist, astrologer, and mathematician who contributed greatly to the revival of interest in mathematics in England. After lecturing and studying on the European continent between 1547 and 1550, Dee returned to England in 1551 and was granted a pension by the government. He became astrologer to the queen, Mary Tudor, and shortly thereafter was imprisoned for being a magician but was released in 1555. Dee later toured Poland and Bohemia (1583-89), giving exhibitions of magic at the courts of various princes. He became warden of Manchester College in 1595.