Microdot

A microdot is text or an image substantially reduced in size onto a small disc to prevent detection by unintended recipients. Microdots are normally circular and around one millimetre in diameter but can be made into different shapes and sizes and made from various materials such as polyester or metal. The name comes from the fact that the microdots have often been about the size and shape of a typographical dot, such as a period or the tittle of a lowercase i or j. Microdots are, fundamentally, a steganographic approach to message protection.

History

In 1870 during the Franco-Prussian War, Paris was under siege and messages were sent by carrier pigeon. Parisian photographer René Dagron used a photographic shrinking technique to permit each pigeon to carry a high volume of messages, as pigeons have a quite restricted payload capacity. However, the images were not as small as modern microdots.

An actual microdot technique was used for steganographic purposes in Germany between World War I and World War II. It was also later used by many countries to pass messages through insecure postal channels. Later microdot techniques used film with aniline dye, rather than silver halide layers, as this was even harder for counter-espionage agents to find. Professor Zapp from Germany is claimed to have been the inventor of the technique, and a World War II spy kit for microdot production was sometimes called a Zapp outfit. However, Emanuel Goldberg is also said to have invented the modern technique. Like much in the history of espionage and subversion, there is controversy.

CJ E&M

CJ E&M Corporation (Hangul: 씨제이이앤엠 주식회사; RR: CJ E&M Jusikhoesa), formerly O Media Holdings Limited (Hangul: (주)오미디어홀딩스; RR: Jusikhoesa O Midieo Holdingseu) is a South Korean entertainment and media contents company. It is a subsidiary of the CJ Group.

History

Divisions

Present

CJ E&M currently has four main divisions, namely:

CJ E&M Music Performance Division

CJ E&M Music Performance Division (Hangul:CJ E&M 음악공연사업부문 CJ E&M eumak gongyeonsa yeopbumun), also known as CJ E&M Music and Live (or Music·Live) (formerly known as Mediopia Technology Corp., GM Agency Co. Ltd., CJ Music Inc. and Mnet Media Corp.), is a South Korean entertainment company headquartered in Seoul, South Korea which produces, broadcasts, distributes and provides a variety of music and entertainment. It is a subsidiary of the CJ Group. Once the home to top-selling groups such as Lee Hyori and SeeYa, its current roster of recording artists include T-ara, CNBLUE and F.T. Island.

CJ E&M Music won the "Music Distributor of the Year" trophy at the 3rd Gaon Chart K-Pop Awards in 2014.

Business

The CJ E&M Music Performance Division consists of five divisions: