is an information theorist and cryptographer, currently the director of Research Center for Information Security ( RCIS),

National Institute of Advanced Industrial Science and Technology The , or AIST, is a Japanese research facility headquartered in Tokyo, and most of the workforce is located in Tsukuba Science City, Ibaraki, and in several cities throughout Japan. The institute is managed to integrate scientific and enginee ...

(AIST) and a full professor at

Chuo University , commonly referred to as or , is a private research university in Hachioji, Tokyo, Japan. The university finds its roots in a school called Igirisu Hōritsu Gakkō (English Law School), which was founded in 1885, and became a university in 1 ...

. His notable work includes research in

coding theory Coding theory is the study of the properties of codes and their respective fitness for specific applications. Codes are used for data compression, cryptography, error detection and correction, data transmission and computer data storage, data sto ...

block cipher In cryptography, a block cipher is a deterministic algorithm that operates on fixed-length groups of bits, called ''blocks''. Block ciphers are the elementary building blocks of many cryptographic protocols. They are ubiquitous in the storage a ...

design, and

public-key cryptography Public-key cryptography, or asymmetric cryptography, is the field of cryptographic systems that use pairs of related keys. Each key pair consists of a public key and a corresponding private key. Key pairs are generated with cryptographic alg ...

. In 1977, together with Hirakawa, he proposed a coded multilevel signal modulation scheme using several classes of binary error-correcting codes, whose symbols are combined to set up the transmission signal. This scheme is known as the Imai-Hirakawa code. He received his Ph.D. in

electrical engineering Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the l ...

from the University of Tokyo in 1971. He was on the faculty of Yokohama National University from then until 1992, before he joined the faculty of the

University of Tokyo The University of Tokyo (, abbreviated as in Japanese and UTokyo in English) is a public research university in Bunkyō, Tokyo, Japan. Founded in 1877 as the nation's first modern university by the merger of several pre-westernisation era ins ...

. He has been the director of RCIS since 2005. He became a professor at Chuo University in April 2006. He became an

IEEE The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE ...

Fellow in 1992 for contributions to the theory of coded modulation and two-dimensional codes, and an IACR Fellow in 2007.

References

External links

Hideki Imai's page at IIS

ResearchMap profile
Living people 1943 births Japanese information theorists Modern cryptographers University of Tokyo alumni International Association for Cryptologic Research fellows Academic staff of Yokohama National University Academic staff of the University of Tokyo Scientists from Shimane Prefecture {{crypto-bio-stub