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James H. Ellis
James Henry Ellis (25 September 1924 – 25 November 1997) was a British engineer and cryptographer. Born in Australia but raised and educated in Britain, Ellis joined GCHQ in 1952. He worked on a number of cryptographic projects, but is credited with some of the original thinking that developed into the field of Public Key Cryptography (PKC). Personal life Ellis was born in Australia, but was raised in Britain and orphaned at an early age. He lived with his grandparents in London's East End. Ellis showed an early gift for mathematics and physics while attending grammar school in Leyton. He attended Imperial College London. In 1949, Ellis married Brenda, an artist and designer. Development of non-secret encryption Ellis first proposed his scheme for "non-secret encryption" in 1970, in a (then) secret GCHQ internal report "The Possibility of Secure Non-Secret Digital Encryption". Ellis said that the idea first occurred to him after reading a paper from World War II by someone a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), adversarial behavior. More generally, cryptography is about constructing and analyzing Communication protocol, protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security (confidentiality, data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, Smart card#EMV, chip-based payment cards, digital currencies, password, computer passwords, and military communications. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malcolm J
Malcolm, Malcom, Máel Coluim, or Maol Choluim may refer to: People * Malcolm (given name), includes a list of people and fictional characters * Malcom (footballer) (born 1997), Brazilian football forward * Clan Malcolm * Maol Choluim de Innerpeffray, 14th-century bishop-elect of Dunkeld Nobility * Máel Coluim, Earl of Atholl, Mormaer of Atholl between 1153/9 and the 1190s * Máel Coluim, King of Strathclyde, 10th century * Máel Coluim of Moray, Mormaer of Moray 1020–1029 * Máel Coluim (son of the king of the Cumbrians), possible King of Strathclyde or King of Alba around 1054 * Malcolm I of Scotland (died 954), King of Scots * Malcolm II of Scotland, King of Scots from 1005 until his death * Malcolm III of Scotland, King of Scots * Malcolm IV of Scotland, King of Scots * Máel Coluim, Earl of Angus, the fifth attested post 10th-century Mormaer of Angus * Máel Coluim I, Earl of Fife, one of the more obscure Mormaers of Fife * Maol Choluim I, Earl of Lennox, Mormaer * Máe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1924 Births
Events January * January 12 – Gopinath Saha shoots Ernest Day, whom he has mistaken for Sir Charles Tegart, the police commissioner of Calcutta, and is arrested soon after. * January 20–January 30, 30 – Kuomintang in China holds its 1st National Congress of the Kuomintang, first National Congress, initiating a policy of alliance with the Soviet Union and the Chinese Communist Party. * January 21 – Alexander Cambridge, 1st Earl of Athlone, The Earl of Athlone is appointed Governor-General of the Union of South Africa, and High Commissioner for Southern Africa.Archontology.org: A Guide for Study of Historical Offices: South Africa: Governors-General: 1910-1961 (Accessed on 14 April 2017) * January 22 – R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public-key Cryptographers
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 algorithms based on mathematical problems termed one-way functions. Security of public-key cryptography depends on keeping the private key secret; the public key can be openly distributed without compromising security. There are many kinds of public-key cryptosystems, with different security goals, including digital signature, Diffie–Hellman key exchange, public-key key encapsulation, and public-key encryption. Public key algorithms are fundamental security primitives in modern cryptosystems, including applications and protocols that offer assurance of the confidentiality and authenticity of electronic communications and data storage. They underpin numerous Internet standards, such as Transport Layer Security (TLS), SSH, S/MIME, and PG ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Leytonstone
The term "the people" refers to the public or common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. In contrast, a people is any plurality of persons considered as a whole. Used in politics and law, the term "a people" refers to the collective or community of an ethnic group or nation. Concepts Legal Chapter One, Article One of the Charter of the United Nations states that "peoples" have the right to self-determination. Though the mere status as peoples and the right to self-determination, as for example in the case of Indigenous peoples (''peoples'', as in all groups of indigenous people, not merely all indigenous persons as in ''indigenous people''), does not automatically provide for independent sovereignty and therefore secession. Indeed, judge Ivor Jennings identified the inherent problems in the right of "peoples" to self-determination, as i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Computing In The United Kingdom
The United Kingdom has been involved with the Internet throughout its origins and development. The telecommunications infrastructure in the United Kingdom provides Internet access to homes and businesses mainly through fibre, cable, mobile and fixed wireless networks. The UK's 140-year-old copper network, maintained by Openreach, was set to be withdrawn by December 2025, although this has since been extended to 31st January 2027 in some areas due to reasons including panic alarms in sheltered housing needing a persistent connection which can't be guaranteed with internet-based DECT systems. The share of households with Internet access in the United Kingdom grew from 9 percent in 1998 to 93 percent in 2019. In 2019, virtually all adults aged 16 to 44 years in the UK were recent internet users (99%), compared with 47% of adults aged 75 years and over; in aggregate, the third-highest in Europe. Internet bandwidth per Internet user was the seventh highest in the world in 2016, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GCHQ Cryptographers
Government Communications Headquarters (GCHQ) is an intelligence and security organisation responsible for providing signals intelligence (SIGINT) and information assurance (IA) to the government and armed forces of the United Kingdom. Primarily based at The Doughnut in the suburbs of Cheltenham, GCHQ is the responsibility of the country's Secretary of State for Foreign and Commonwealth Affairs (Foreign Secretary), but it is not a part of the Foreign Office and its director ranks as a Permanent Secretary. GCHQ was originally established after the First World War as the Government Code and Cypher School (GC&CS) and was known under that name until 1946. During the Second World War it was located at Bletchley Park, where it was responsible for breaking the German Enigma codes. There are two main components of GCHQ, the Composite Signals Organisation (CSO), which is responsible for gathering information, and the National Cyber Security Centre (NCSC), which is responsible for secur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alumni Of Imperial College London
Alumni (: alumnus () or alumna ()) are former students or graduates of a school, college, or university. The feminine plural alumnae is sometimes used for groups of women, and alums (: alum) or alumns (: alumn) as gender-neutral alternatives. The word comes from Latin, meaning nurslings, pupils or foster children, derived from "to nourish". The term is not synonymous with "graduates": people can be alumni without graduating, e.g. Burt Reynolds was an alumnus of Florida State University but did not graduate. The term is sometimes used to refer to former employees, former members of an organization, former contributors, or former inmates. Etymology The Latin noun means "foster son" or "pupil". It is derived from the Latin verb "to nourish". Separate, but from the same root, is the adjective "nourishing", found in the phrase '' alma mater'', a title for a person's home university. Usage in Roman law In Latin, is a legal term (Roman law) to describe a child placed in fostera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Director Of GCHQ
__NOTOC__ The Director of the Government Communications Headquarters is the highest-ranking official in the Government Communications Headquarters (GCHQ), a British intelligence agency that specialises in signals intelligence, information assurance and cryptography. The director is a Permanent Secretary, and appointed by and reports to the Secretary of State for Foreign and Commonwealth Affairs. Though the Prime Minister of the United Kingdom has ultimate responsibility within the British government for security matters and the intelligence agencies, the Foreign Secretary has day to day ministerial responsibility for GCHQ. The Director of GCHQ is also a permanent member of the United Kingdom's National Security Council and the Cabinet Office's Joint Intelligence Committee. The role of the Director of GCHQ was outlined by the Intelligence Services Act 1994, in which the director is described as "...responsible for the efficiency of GCHQ". The director's role is to ensure: The GC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Hannigan
Robert Peter Hannigan CMG (born 1965) is a cybersecurity specialist who has been Warden of Wadham College, Oxford, since 2021. He was a senior British civil servant who previously served as the director of the signals intelligence and cryptography agency the Government Communications Headquarters (GCHQ) and established the UK's National Cyber Security Centre. Early and family life Hannigan was born in Gloucestershire and brought up in Yorkshire. He studied classics at Wadham College, Oxford, and continued his education at Heythrop College, University of London. He is married with a son and a daughter. Career Northern Ireland Peace Process After an early career in the private sector, Hannigan became Deputy Director of Communications for the Northern Ireland Office in 2000, Director of Communications for the Northern Ireland Office in 2001 and Associate Political Director for the Northern Ireland Office in 2004. He served as the Director-General, Political at the Norther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet Security
Internet security is a branch of computer security. It encompasses the Internet, browser security, web site security, and network security as it applies to other applications or operating systems as a whole. Its objective is to establish rules and measures to use against attacks over the Internet. The Internet is an inherently insecure channel for information exchange, with high risk of intrusion or fraud, such as phishing, online viruses, trojans, ransomware and worms. Many methods are used to combat these threats, including encryption and ground-up engineering. Threats Emerging Threats Emerging cyberthreats are a result of recent technological breakthroughs. For example, deepfakes use AI to produce audio and video that seems real but are actually fake, which increases the danger of fraud and false information. Furthermore, traditional risks can be automated and strengthened by AI-driven attacks, making them harder to identify and neutralize. Malicious software Maliciou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RSA (cryptosystem)
The RSA (Rivest–Shamir–Adleman) cryptosystem is a public-key cryptosystem, one of the oldest widely used for secure data transmission. The initialism "RSA" comes from the surnames of Ron Rivest, Adi Shamir and Leonard Adleman, who publicly described the algorithm in 1977. An equivalent system was developed secretly in 1973 at Government Communications Headquarters (GCHQ), the British signals intelligence agency, by the English mathematician Clifford Cocks. That system was declassified in 1997. In a public-key cryptosystem, the encryption key is public and distinct from the decryption key, which is kept secret (private). An RSA user creates and publishes a public key based on two large prime numbers, along with an auxiliary value. The prime numbers are kept secret. Messages can be encrypted by anyone via the public key, but can only be decrypted by someone who knows the private key. The security of RSA relies on the practical difficulty of factoring the product o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
