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🔗 Computing 🔗 Computer science 🔗 Cryptography 🔗 Cryptography/Computer science

Diffie–Hellman key exchange is a method of securely exchanging cryptographic keys over a public channel and was one of the first public-key protocols as conceived by Ralph Merkle and named after Whitfield Diffie and Martin Hellman. DH is one of the earliest practical examples of public key exchange implemented within the field of cryptography.

Traditionally, secure encrypted communication between two parties required that they first exchange keys by some secure physical means, such as paper key lists transported by a trusted courier. The Diffie–Hellman key exchange method allows two parties that have no prior knowledge of each other to jointly establish a shared secret key over an insecure channel. This key can then be used to encrypt subsequent communications using a symmetric key cipher.

Diffie–Hellman is used to secure a variety of Internet services. However, research published in October 2015 suggests that the parameters in use for many DH Internet applications at that time are not strong enough to prevent compromise by very well-funded attackers, such as the security services of large governments.

The scheme was published by Whitfield Diffie and Martin Hellman in 1976, but in 1997 it was revealed that James H. Ellis, Clifford Cocks, and Malcolm J. Williamson of GCHQ, the British signals intelligence agency, had previously shown in 1969 how public-key cryptography could be achieved.

Although Diffie–Hellman key agreement itself is a non-authenticated key-agreement protocol, it provides the basis for a variety of authenticated protocols, and is used to provide forward secrecy in Transport Layer Security's ephemeral modes (referred to as EDH or DHE depending on the cipher suite).

The method was followed shortly afterwards by RSA, an implementation of public-key cryptography using asymmetric algorithms.

Expired U.S. Patent 4,200,770 from 1977 describes the now public-domain algorithm. It credits Hellman, Diffie, and Merkle as inventors.

Bohm Dialogue (also known as Bohmian Dialogue or "Dialogue in the Spirit of David Bohm") is a freely flowing group conversation in which participants attempt to reach a common understanding, experiencing everyone's point of view fully, equally and nonjudgementally. This can lead to new and deeper understanding. The purpose is to solve the communication crises that face society, and indeed the whole of human nature and consciousness. It utilizes a theoretical understanding of the way thoughts relate to universal reality. It is named after physicist David Bohm who originally proposed this form of dialogue.

🔗 Archaeology 🔗 Croatia

The Liber Linteus Zagrabiensis (Latin for "Linen Book of Zagreb", also rarely known as Liber Agramensis, "Book of Agram") is the longest Etruscan text and the only extant linen book, dated to the 3rd century BCE. It remains mostly untranslated because of the lack of knowledge about the Etruscan language, though the few words which can be understood indicate that the text is most likely a ritual calendar.

The fabric of the book was preserved when it was used for mummy wrappings in Ptolemaic Egypt. The mummy was bought in Alexandria in 1848 and since 1867 both the mummy and the manuscript have been kept in Zagreb, Croatia, now in a refrigerated room at the Archaeological Museum.

🔗 Books 🔗 Systems 🔗 Business 🔗 Psychology 🔗 United Kingdom 🔗 Engineering 🔗 Invention 🔗 Systems/Project management 🔗 Method engineering

Six Thinking Hats was written by Dr. Edward de Bono. "Six Thinking Hats" and the associated idea parallel thinking provide a means for groups to plan thinking processes in a detailed and cohesive way, and in doing so to think together more effectively.

In 2005, the tool found some use in the United Kingdom innovation sector, where it was offered by some facilitation companies and had been trialled within the United Kingdom's civil service.

🔗 Internet culture

Zalgo text, also known as cursed text due to the nature of its use, is digital text that has been modified with numerous combining characters, Unicode symbols used to add diacritics above or below letters, to appear frightening or glitchy.

Named for a 2004 Internet creepypasta story that ascribes it to the influence of an eldritch deity, Zalgo text has become a significant component of many Internet memes, particularly in the "surreal meme" culture. The formatting of Zalgo text also allows it to be used to halt or impair certain computer functions, whether intentionally or not.

🔗 United States 🔗 Film 🔗 Film/American cinema 🔗 United States/Film - American cinema 🔗 Fictional characters 🔗 Animation 🔗 Disney 🔗 United States/Animation - American animation 🔗 Film/Animated films 🔗 Project-independent assessment 🔗 Animation/Animated films 🔗 Animation/American animation

Oswald the Lucky Rabbit (also known as Oswald the Rabbit, Oswald Rabbit, and Ozzie) is an animated cartoon character created in 1927 by Walt Disney and Ub Iwerks for Universal Pictures. He starred in several animated short films released to theaters from 1927 to 1938. Twenty-seven animated Oswald shorts were produced at the Walt Disney Studio. After Universal took control of Oswald's character in 1928, Disney created Mickey Mouse as a replacement to Oswald.

In 2003, Buena Vista Games pitched a concept for an Oswald-themed video game to then-Disney President and future-CEO Bob Iger, who became committed to acquiring the rights to Oswald. In 2006, The Walt Disney Company acquired the trademark of Oswald (with NBCUniversal effectively trading Oswald for the services of Al Michaels as play-by-play announcer on NBC Sunday Night Football).

Oswald returned in Disney's 2010 video game, Epic Mickey. The game's metafiction plot parallels Oswald's real-world history, dealing with the character's feelings of abandonment by Disney and envy toward Mickey Mouse. He has since appeared in Disney theme parks and comic books, as well as two follow-up games, Epic Mickey 2: The Power of Two and Epic Mickey: Power of Illusion. Oswald made his first appearance in an animated production in 85 years through his cameo appearance in the 2013 animated short Get a Horse! He was the subject of the 2015 feature film Walt Before Mickey. Oswald also appears as a townsperson in Disney Infinity 2.0. In 2022, Oswald appeared in a new short produced by Disney. He also has a cameo appearance in Once Upon a Studio.

In January 2023, the copyrights on several of the original Oswald shorts, as well as the character, expired. Those films and the character are now in the public domain. In 2024, it was announced that the character will appear in Oswald: Down the Rabbit Hole, an upcoming horror film directed by Lilton Stewart III, starring Ernie Hudson as the titular character.

🔗 Economics

A job guarantee (JG) is an economic policy proposal aimed at providing a sustainable solution to the dual problems of inflation and unemployment. Its aim is to create full employment and price stability, by having the state promise to hire unemployed workers as an employer of last resort (ELR).

The economic policy stance currently dominant around the world uses unemployment as a policy tool to control inflation; when inflation rises, the government pursues contractionary fiscal or monetary policy, creating a buffer stock of unemployed people, reducing wage demands, and ultimately inflation. When inflationary expectations subside, expansionary policy aims to produce the opposite effect. In Marxian terms, the unemployed serve as a reserve army of labor. By contrast, in a job guarantee program, a buffer stock of employed people (employed in the job guarantee program) provides the same protection against inflation without the social costs of unemployment, hence potentially fulfilling the dual mandate of full employment and price stability.

🔗 Disaster management 🔗 Death 🔗 Kansas City 🔗 Missouri

On July 17, 1981, two walkways collapsed at the Hyatt Regency Kansas City hotel in Kansas City, Missouri, one directly above the other. They crashed onto a tea dance being held in the hotel's lobby, killing 114 and injuring 216. As a product of a corporate culture of profound neglect, the disaster contributed many lessons to the study of engineering ethics and errors, and to emergency management. The event remains the deadliest non‑deliberate structural failure in American history, and it was the deadliest structural collapse in the U.S. until the collapse of the World Trade Center towers 20 years later.

🔗 History 🔗 Ancient Near East 🔗 Business 🔗 Iraq

The complaint tablet to Ea-nasir is a clay tablet from ancient Babylon written c. 1750 BC. It is a complaint to a merchant named Ea-Nasir from a customer named Nanni. Written in cuneiform, it is considered to be the oldest known written complaint. It is currently kept in the British Museum.

Ea-Nasir travelled to the Persian Gulf to buy copper and return to sell it in Mesopotamia. On one particular occasion, he had agreed to sell copper ingots to Nanni. Nanni sent his servant with the money to complete the transaction. The copper was sub-standard and not accepted. In response, Nanni created the cuneiform letter for delivery to Ea-nasir. Inscribed on it is a complaint to Ea-nasir about a copper ore delivery of the incorrect grade, and issues with another delivery. He also complained that his servant (who handled the transaction) had been treated rudely. He stated that, at the time of writing, he had not accepted the copper but had paid the money.

The tablet is 11.6 centimetres (4.6 in) high, 5 centimetres (2.0 in) wide, 2.6 centimetres (1.0 in) thick, and slightly damaged. Translated from Akkadian, it reads:

Tell Ea-nasir: Nanni sends the following message:

When you came, you said to me as follows : "I will give Gimil-Sin (when he comes) fine quality copper ingots." You left then but you did not do what you promised me. You put ingots which were not good before my messenger (Sit-Sin) and said: "If you want to take them, take them; if you do not want to take them, go away!"

What do you take me for, that you treat somebody like me with such contempt? I have sent as messengers gentlemen like ourselves to collect the bag with my money (deposited with you) but you have treated me with contempt by sending them back to me empty-handed several times, and that through enemy territory. Is there anyone among the merchants who trade with Telmun who has treated me in this way? You alone treat my messenger with contempt! On account of that one (trifling) mina of silver which I owe(?) you, you feel free to speak in such a way, while I have given to the palace on your behalf 1,080 pounds of copper, and Šumi-abum has likewise given 1,080 pounds of copper, apart from what we both have had written on a sealed tablet to be kept in the temple of Shamash.

How have you treated me for that copper? You have withheld my money bag from me in enemy territory; it is now up to you to restore (my money) to me in full.

Take cognizance that (from now on) I will not accept here any copper from you that is not of fine quality. I shall (from now on) select and take the ingots individually in my own yard, and I shall exercise against you my right of rejection because you have treated me with contempt.

The tablet was acquired by the British Museum in 1953. It was originally found in the ruins of Ur.

🔗 United States 🔗 International relations 🔗 Soviet Union 🔗 Agriculture 🔗 Trade 🔗 Soviet Union/economy of Russia

The great grain robbery was the July 1972 purchase of 10 million tons of grain (mainly wheat and corn) from the United States by the Soviet Union at subsidized prices, which caused global grain prices to soar. Crop shortfalls in 1971 and 1972 forced the Soviet Union to look abroad for grain, hoping to prevent famine or crisis. Soviet negotiators worked out a deal to buy grain on credit, but quickly exceeded their credit limit. The American negotiators did not realize that both the Soviets and the world grain market had suffered shortfalls, and thus chose to subsidize the purchase. The strategy backfired and intensified the crisis with global food prices rose at least 30%, and grain stockpiles were decimated.