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Chosen-ciphertext attack
A chosen-ciphertext attack is a cryptanalysis model in which an attacker gets decryptions of chosen ciphertexts from a decryption oracle to break an encryption scheme.
Chotia Weedhopper
The Chotia Weedhopper, or Weedhopper, is an American single-seat ultralight aircraft designed by John Chotia and first flown in 1977, with nearly 15,000 sold by 2002.
Chottanikkara Temple
Chottanikkara Temple is a Hindu temple near Kochi in Kerala, India, dedicated to the goddess Bhagavathy, worshipped in three forms daily and famed for healing mental distress.
Chowmahalla Palace
Chowmahalla Palace, or Chowmahallat, is the palace complex of the Nizams of Hyderabad in Telangana, India, seat of the Asaf Jahi dynasty from the mid-18th century until 1950, now a museum.
CHP-20 (Mosenergo) power station
CHP-20 (ТЭЦ-20; originally Калужская ТЭЦ) is a gas-fired combined heat and power plant in southwestern Moscow, owned by Mosenergo, with an electric capacity of about 985 MW and serving about 1.5 million people since 1952.
CHP-21 (Mosenergo) power station
CHP-21, known as TETs-21 (ТЭЦ-21) or Khovrinskaya TETs, is a gas-fired combined heat and power plant in northwest Moscow, operated by Mosenergo since 1963 and described as Europe's largest heat producer.
CHP-23 (Mosenergo) power station
CHP-23, also written TETs-23, is a gas-fired combined heat and power station in eastern Moscow, commissioned in 1966, with 1,440 MW capacity and operated by Mosenergo.
CHP-25 (Mosenergo) power station
CHP-25 (ТЭЦ-25), also known as Ochakovo CHP, is a gas-fired combined heat and power plant in western Moscow, owned by Mosenergo since 1975, with 1,370 MW capacity.
CHP-26 (Mosenergo) power station
CHP-26 (ТЭЦ-26), also called the South Thermal Power Plant, is a gas-fired combined heat and power plant in southern Moscow and the largest in the city, at 1,840.9 MW.
CHP-27 (Mosenergo) power station
CHP-27 (ТЭЦ-27), originally called the Severnaya Thermal Power Plant, is a gas-fired combined heat and power station in Mytishchi, Moscow Oblast, Russia, owned by Mosenergo.
Chris Cline
Chris Cline, also known as Christopher Cline, was an American coal-mining billionaire from West Virginia who founded Foresight Energy and died in a 2019 helicopter crash in the Bahamas.
Chris G. Whipple
Chris G. Whipple is an American engineer and risk analyst specializing in radioactive waste, hazardous air pollutants, and mercury, elected to the National Academy of Engineering in 2001.
Chris Gerdes
Chris Gerdes is an American mechanical engineer at Stanford known for self-driving race cars and as the first Chief Innovation Officer of the US Department of Transportation.
Chris Hadfield
Chris Hadfield (Chris Austin Hadfield), born in 1959, is a retired Canadian astronaut who became the first Canadian to command the International Space Station, in 2013.
Chris Hughes
Chris Hughes is an American entrepreneur and writer who co-founded Facebook in 2004, bought The New Republic in 2012, and now chairs the Economic Security Project.
Chris Krebs
Chris Krebs is an American cybersecurity official who served as the first Director of CISA from 2018 until President Trump fired him in November 2020.
Chris L. Dwyer
Chris L. Dwyer is a computer engineer and nanotechnologist at Duke University who builds computing, sensing, and storage devices from self-assembled DNA nanostructures, and received the 2008 Presidential Early Career Award.
Chris Lattner
Chris Lattner is an American software engineer who created LLVM, Clang, and Swift at Apple, later co-authored MLIR and co-founded Modular, whose Mojo language Qualcomm acquired in 2026.
Chris Olah
Chris Olah, also known as Christopher Olah, is an AI researcher and cofounder of Anthropic, where he leads interpretability research after earlier work at Google Brain and OpenAI.
Chris Pavlovski
Chris Pavlovski is a Canadian technology entrepreneur, founder and CEO of the video platform Rumble, which he launched in Toronto in 2013 as a YouTube alternative.
Chris Sutherland (programmer)
Chris Sutherland is a British video game programmer and voice actor, best known as lead programmer of Donkey Kong Country and Banjo-Kazooie and the voice of both characters.
Chris T. Hendrickson
Chris T. Hendrickson is an American civil and environmental engineer, Hamerschlag University Professor Emeritus at Carnegie Mellon, a National Academy of Engineering member known for economic input-output life-cycle assessment.
Chris Wolverton
Chris Wolverton is a computational materials scientist and professor at Northwestern University who created the Open Quantum Materials Database, predicting new materials before they are made in a lab.
Chris-Craft Industries
Chris-Craft Industries, once known as NAFI Corporation, was an American holding company that acquired the Chris-Craft boat business in 1960 and later operated ten television stations until News Corporation bought it in 2001.
Christ Cathedral (Garden Grove, California)
Christ Cathedral, formerly the Crystal Cathedral, is the Catholic cathedral of the Diocese of Orange in Garden Grove, California; Philip Johnson's 1980 glass megachurch, bought in 2012 for $57.5 million and dedicated July 17, 2019 after a $72.3 million renovation.
Christ Church, Philadelphia
Christ Church is a historic Episcopal church in Philadelphia's Old City, founded in 1695, whose Georgian building was the place of worship of George Washington and Benjamin Franklin.
Christa McAuliffe
Sharon Christa McAuliffe was an American high school teacher selected from 11,000 applicants as NASA's first Teacher in Space; she died aboard Challenger in 1986.
Christchurch Airport
Christchurch Airport is New Zealand's second largest airport, serving Christchurch and the South Island from Harewood, 12 kilometers northwest of the city center. It became the country's first international airport in 1950.
Christian Breyer
Christian Breyer is a German engineer and Professor of Solar Economy at Finland's LUT University since 2014, known for modeling 100% renewable energy systems and Power-to-X.
Christian J. Lambertsen
Christian J. Lambertsen (1917–2011) was an American physician at the University of Pennsylvania who invented a self-contained underwater breathing apparatus and coined the term SCUBA.