Ben-Zion "Benny" Chor (23 December 1956 – 10 June 2021) was an Israeli computer scientist. He was known for his research in cryptography, including traitor tracing, randomness extractors, private information retrieval, the

security level In cryptography, security level is a measure of the strength that a cryptographic primitive — such as a cipher or hash function — achieves. Security level is usually expressed as a number of "bits of security" (also security strength ...

and single-bit security of

RSA encryption RSA (Rivest–Shamir–Adleman) is a public-key cryptosystem that is widely used for secure data transmission. It is also one of the oldest. The acronym "RSA" comes from the surnames of Ron Rivest, Adi Shamir and Leonard Adleman, who publicly ...

, and secret sharing. Beyond cryptography, he also made important contributions in distributed shared-memory consensus and in the discovery of patterns in

gene expression Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product that enables it to produce end products, protein or non-coding RNA, and ultimately affect a phenotype, as the final effect. The ...

data.

Early life and education

Chor was born on 23 December 1956, and raised in Tel Aviv. He was an undergraduate mathematics student at the

Hebrew University of Jerusalem The Hebrew University of Jerusalem (HUJI; he, הַאוּנִיבֶרְסִיטָה הַעִבְרִית בִּירוּשָׁלַיִם) is a public research university based in Jerusalem, Israel. Co-founded by Albert Einstein and Dr. Chaim Weiz ...

, graduating in 1980 and earning a master's degree there in 1981. He became a doctoral student in computer science at the Massachusetts Institute of Technology (MIT), working there on cryptography with Ron Rivest; he completed his Ph.D. in 1985 with the dissertation ''Two Issues in Public Key Cryptography: RSA Bit Security and a New Knapsack Type System''. With this work, he became a series winner of the 1985 ACM Doctoral Dissertation Award.

Career and later life

After postdoctoral research at MIT and Harvard University, Chor became a faculty member at the Technion – Israel Institute of Technology from 1987 to 1999. He moved to Tel Aviv University in 1999, where he remained for the rest of his career. He headed the Tel Aviv School of Computer Science from 2018 to 2020. In 2019, he became founding head of the French-Israeli Laboratory on Foundations of Computer Science. Chor died on 10 June 2021.

Book

Chor was the coauthor, with Amir Rubenstein, of the book ''Computational Thinking for Life Scientists: Using Algorithms in Biological Research'', published posthumously by the Cambridge University Press in 2022.

References

External links

* {{DEFAULTSORT:Chor, Benny 1956 births 2021 deaths Israeli computer scientists Scientists from Tel Aviv Hebrew University of Jerusalem alumni Massachusetts Institute of Technology alumni Academic staff of Technion – Israel Institute of Technology Academic staff of Tel Aviv University