From sub0 at octade.net Sun Feb 1 05:18:13 2026 From: sub0 at octade.net (Byrl Raze Buckbriar) Date: Sun, 1 Feb 2026 10:18:13 -0000 Subject: [Cryptography] PERFECT PANGRAM HASH : Anagram Hash Function Message-ID: PERFECT PANGRAM HASH : Anagram Hash Function #DOI https://doi.org/10.5281/zenodo.18448042 A pangram is a sentence or phrase that contains each letter of an alphabet or character set at least once. A perfect pangram is an anagram of the alphabet which contains each letter exactly once. Pangram hash generates a perfect pangram hash digest consisting of a anagram permutation of a character set. Each character in the output is unique and non-repeating. #Hashing #Cryptography #Anagrams #Papers #Preprints -- = OCTADE = alt.rhubarb = misc.misc = sci.crypt = = https://soc.octade.net/octade = From jan at dusatko.org Sun Feb 1 06:56:13 2026 From: jan at dusatko.org (=?UTF-8?B?SmFuIER1xaHDoXRrbw==?=) Date: Sun, 1 Feb 2026 12:56:13 +0100 Subject: [Cryptography] Some quantum computers might need more power than supercomputers In-Reply-To: References: <4A7E895B-2C48-44C0-8C9B-37E3FB6DEE1E@callas.org> Message-ID: > If I take the cooling of an absolutely black body with an area of > ??1m^2 from 20?C to mK and ?K, then I have some heat flow > characteristics. But if I take the Carnot machine calculation, then > the worst possible scenario produce list of needs. For cooling an > absolutely black body with a surface area of 1m^2 that means: > - To a temperature of 1K requires an input of 122KW > - To a temperature of 0.1K requires an input of 1.22MW > - To a temperature of 0.01K requires an input of 12.2MW > - To a temperature in mK requires an input of 122MW > - To a temperature in ?K requires an input of 122GW > > To cool the delivered 1W (Carnot cooling, the best possible option and > optimistic attitude) for perfectly insulated body, we need the > following cooling device power: > - To a temperature of 1K requires an input of 293W > - To a temperature of 0.1K requires an input of 2.93kW > - To a temperature of 0.01 K requires an input of 29.3 kW > - To a temperature of 1mK requires an input of 293W > - To a temperature of 1?K requires an input of 293MW > > For my surprise, the possible heat conductivity by construction is > very low, about 2,0-2,2W. I estimated rod with a circular > cross-section of diameter 18,3mm. I choose it because QC in ball of > surface are?1m^2?probably cannot be heavier than iron ball. But > radiation could make things worse than thermal conductivity. This is a > reason why I did not count that. > Update: In reality, layering of protections significantly reduces radiation transmission, where each additional layer can reduce transmission to 3% - 5% of the original flux. Ideally, two layers with attenuation of 5% of the original flux should give a total attenuation of 0.25%. However, no structure is perfect, so in reality we can get values ??corresponding to more than the formula q?1/(N+1). In such a case, somewhere around 50 layers, the main heat transfer should be through the structure. The theoretical limit of insulation should be able to limit the radiation flux from 460W to 4.6?W. The above limitations are given by the physical properties of the material and quantum phenomena. Regards Jan