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#cryptology

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OCTADE
I am looking for profiles to follow. Currently I am interested in following users who have an interest in or work in:

#Cryptography #Cryptology #Ciphers #Codes #Puzzles #TrapDoorMaths #Algorithms #MixNets #Encryption #HandCiphers #FieldCiphers

... and arcane math problems or trying to find a way to use them for securing information or messages. Any recommendations will be appreciated.

I'm looking for interesting new ideas and models from people who like to tinker rather than more rehashed, industry standard cryptography.

@crypto@a.gup.pe @patentbuddy@mastodon.social
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OCTADE
'period'
'cipher period'
'periodic range'
'periodic limit'
'periodicity'

This is not to be confused with 'cryptoperiod' or 'key period' or 'key time domain' which refers to the time a key is valid.

The 'period' refers to the length of the cipher stream or generator stream before it repeats from the initial keying or initialization state. Some ciphers may be considered unsafe before reaching this generator period for other reasons, such as mode mixing.

For example we might say the generator period is 2^155337 which means after generating that much data the stream would cycle back to its initial values. If the amount of data fed into the cipher stream exceeds the period then security is compromised (theoretically, in practice it might be unnoticed by an attacker).

Last I checked AES has a period of something like 2^39 - 256 for the same key. Your key schedule should be automatically handling that anyway to a much smaller limit.

The cipher period limitation may be referred to as:

'maximum safe ciphertext length' or 'maximum safe message size'

#cryptography #cipher #cryptanalysis #cryptology #crypto #math #encryption
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OCTADE
Cryptologue Arcade - Crypto Darkpaper - Crypto Color Prints - Simplementation Scheme : A Color-Coded Method For Indexing Research and Documentation

https://doi.org/10.5281/zenodo.13149715

Crypto Color Prints are a memorable and data-dense documentation paradigm with a color-coded, structural scheme. The scheme separates concerns by color grouping. The scheme forms a simple framework for organizing, referencing, publishing and improving primitives and protocols with a focus on both cooperation and implementation. The Cryptologue scheme is designed for collating descriptions of various components of larger systems into a color-coded reference system.

#Publications #Reference #Documentation #Schemes #Information #Papers #Preprints #Cryptography #Cryptology #Crypto #Darkpaper #Zenodo #OCTADE

@crypto@a.gup.pe @academicchatter@a.gup.pe @openscience@a.gup.pe @science@a.gup.pe @edutooters@a.gup.pe @phdstudents@a.gup.pe @infosec@a.gup.pe @writing@a.gup.pe @writers@a.gup.pe @infostorm@a.gup.pe
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h o ʍ l e t t

→ How Telegram's Founder Pavel Durov Became a Culture War Martyr
404media.co/how-telegrams-foun

Telegram messages are generally not encrypted despite a widespread misconception that could have dramatic consequences for activists/journalists all over the world.

“It can be simultaneously true that #PavelDurov has enabled some of the worst things on the #internet via #Telegram but that his arrest partially on the grounds of “providing #cryptology services” should be more broadly concerning.”

404 Media · How Telegram's Founder Pavel Durov Became a Culture War MartyrConservatives have spent months championing Telegram as an app that more closely aligns with their values than Signal.
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Project Gutenberg

Agnes Meyer Driscoll, known as "Miss Aggie" or "Madame X'", was born #OTD in 1889.

She was an American cryptanalyst during both World War I and World War II and was known as "the first lady of naval cryptology." Driscoll played a key role in breaking the Red Book code, a Japanese naval code, in the 1920s. She worked on machine ciphers & contributed to the development of new cryptographic techniques and devices.

en.wikipedia.org/wiki/Agnes_Me

Agnes Meyer Driscoll. She is seated, facing slightly towards the camera with a calm and composed expression. Driscoll is dressed in a formal, dark-colored suit jacket over a light blouse, typical of mid-20th-century professional attire. A brooch or pin is often seen on her lapel, adding a touch of personal style. Her hair is neatly styled, pulled back in a manner that was both practical and fashionable for the time.
#science#cryptology#intelligenceanalysis
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earthling

Code Warriors: NSA's Codebreakers and the Secret Intelligence War Against the Soviet Union by Stephen Budiansky, 2016

Stephen Budiansky—a longtime expert in cryptology—tells the fascinating story of how NSA came to be, from its roots in World War II through the fall of the Berlin Wall. Along the way, he guides us through the fascinating challenges faced by cryptanalysts, and how they broke some of the most complicated codes of the 20th c.

@bookstodon
#books
#cryptology
#codebreaking
#NSA

A sweeping, in-depth history of NSA. The National Security Agency was born out of the legendary codebreaking programs of World War II that cracked the famed Enigma machine and other German and Japanese codes, thereby turning the tide of Allied victory. In the postwar years, as the United States developed a new enemy in the Soviet Union, our intelligence community found itself targeting not soldiers on the battlefield, but suspected spies, foreign leaders, and even American citizens. Throughout the second half of the twentieth century, NSA played a vital, often fraught and controversial role in the major events of the Cold War, from the Korean War to the Cuban Missile Crisis to Vietnam and beyond. With access to new documents, Budiansky shows where the agency succeeded and failed during the Cold War, but his account also offers crucial perspective for assessing NSA today in the wake of the Edward Snowden revelations. Budiansky shows how NSA’s obsession with recording every bit of data and decoding every signal is far from a new development; throughout its history the depth and breadth of the agency’s reach has resulted in both remarkable successes and destructive failures. Featuring a series of appendixes that explain the technical details of Soviet codes and how they were broken, this is a rich and riveting history of the underbelly of the Cold War, and an essential and timely read for all who seek to understand the origins of the modern NSA.
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Volker Schröder 🌎

"How three amateurs cracked a 445-year-old code to reveal Mary Queen of Scots’ secrets

For centuries, a trove of letters lay unidentified in an archive. Then a patents expert, a music professor and a software engineer set to work."

By Imogen Savage in the Financial Times Magazine (subscription needed):
ft.com/content/bb1fe5d4-6059-4

Attached image: Part of the cipher used by Mary to communicate with France’s ambassador Michel de Castelnau Mauvissière, as discovered by Lasry, Biermann and Tomokiyo © Lasry, Biermann, Tomokiyo

Part of the cipher used by Mary to communicate with France’s ambassador Michel de Castelnau Mauvissière, as discovered by Lasry, Biermann and Tomokiyo
#manuscripts#earlymodern#cryptology
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Dan Goodin

Codebreakers deciphered dozens of century-old letters stored in French archives and discovered they were written by Mary, Queen of Scots. It turns out she was "well-trained in the art of cipher by her mother, Marie de Guise, from a very young age."

My Ars colleague @JenLucPiquant spins a fascinating tale that nicely blends #history and #cryptology.

arstechnica.com/science/2023/0

Ars TechnicaLost and found: Codebreakers decipher 50+ letters of Mary, Queen of ScotsThe cache of letters sheds new light on Mary Stuart's years of captivity in England.
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Lawrence Pritchard Waterhouse

Thing I love most about this place? It reflects way more of the diversity of life than any commercial place ever could. I'm a #mensa member #aspie #socialanarchist, a #cisbutpreferssingularthey #polyamorous #pansexual #queer #sadist #protector #dom with very diverse partners. I have interests from #hacking to #lockpicking to #cryptology to #spycraft to #statecraft. I play with #Lego and #Cobi... And, know what? I am not *at* *all* unusual here and that feels great. Thx, #fediverse, stay weird!🦥

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