Cryptography | Random number generation
In cryptography, nothing-up-my-sleeve numbers are any numbers which, by their construction, are above suspicion of hidden properties. They are used in creating cryptographic functions such as hashes and ciphers. These algorithms often need randomized constants for mixing or initialization purposes. The cryptographer may wish to pick these values in a way that demonstrates the constants were not selected for a nefarious purpose, for example, to create a backdoor to the algorithm. These fears can be allayed by using numbers created in a way that leaves little room for adjustment. An example would be the use of initial digits from the number π as the constants. Using digits of π millions of places after the decimal point would not be considered trustworthy because the algorithm designer might have selected that starting point because it created a secret weakness the designer could later exploit. Digits in the positional representations of real numbers such as π, e, and irrational roots are believed to appear with equal frequency (see normal number). Such numbers can be viewed as the opposite extreme of Chaitin–Kolmogorov random numbers in that they appear random but have very low information entropy. Their use is motivated by early controversy over the U.S. Government's 1975 Data Encryption Standard, which came under criticism because no explanation was supplied for the constants used in its S-box (though they were later found to have been carefully selected to protect against the then-classified technique of differential cryptanalysis). Thus a need was felt for a more transparent way to generate constants used in cryptography. "Nothing up my sleeve" is a phrase associated with magicians, who sometimes preface a magic trick by holding open their sleeves to show they have no objects hidden inside. (Wikipedia).
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From playlist Sect2.3, Evaluating Limits Algebraically
Subtracting decimals from a whole number
This is a short video tutorial on subtracting decimals from a whole number. For interactive applets, worksheets, and more videos go to http://fearlessmath.net ▪️▪️▪️ FOLLOW ME ON TWITTER ▪️▪️▪️ http://twitter.com/dhabecker
From playlist All about decimals
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From playlist Limits at Infinities, (sect 2.6)
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From playlist Limits at Infinities, (sect 2.6)
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From playlist Limits at Infinities, (sect 2.6)
Investigating Domain (2 of 2: Square Roots)
More resources available at www.misterwootube.com
From playlist Further Work with Functions (related content)
I introduce the basic Properties of Real Numbers: Commutative Property of Addition and Multiplication, Associative Property of Addition and Multiplication, Identity Property of Multiplication, Identity Property of Addition, Zero Product Property, and Multiplying by Negative One. I also d
From playlist Algebra 1
Q208, "5, 7, 5, 7, 5, 7 sequence"
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From playlist Sequence, Calculus 2
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From playlist Direct & Limit Comparison Tests, Calculus 2
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From playlist Limits at Infinities, (sect 2.6)
EEVblog #963 - Batteriser / Batteroo Passive Toy Test!
The Batteriser / Batteroo AAA sleeve tested in a toy train passive load and the results analysed! Does the Batteriser finally live up to the claims of increased performance in passive loads? or is it a complete turkey? More videos to come... Full train test footage in a single take: https
From playlist Debunking
EEVblog #780 - Samsung LCD TV Dumpster Dive Teardown
Dave finds a nice 46" Samsung LED backlight LCD TV in the dumpster, will it work? What's inside? Also I look at using the Inventables waterproof insulating solder sleeves: https://www.inventables.com/technologies/solder-sleeves NOTE: I think a wide nozzle heat gun must be used on these. Th
From playlist Dumpster Diving
How many different outfits can you make with 2 shirts, 3 pants and 2 shoes?
How to solve a counting problem using a tree diagram and the fundamental counting principle. For more in-depth math help check out my catalog of courses. Every course includes over 275 videos of easy to follow and understand math instruction, with fully explained practice problems and pri
From playlist GED Prep Videos
MACHINE SHOP TIPS #112 Tubalcain Buys Yet Another Lathe-This Time a Logan part 2
Tubalcain buys a logan lathe-Part 2. To see Part 1 of Buying Another Logan, click on this link. https://www.youtube.com/watch?v=zkjealSB5n4
From playlist #2 MACHINE SHOP TIPS tubalcain playlist #101 thru #200
Arduino Lilypad Death Star Christmas Sweater step-by-step tutorial
Step-by-step tutorial for making a custom Death Star Christmas sweater complete with glittering LEDs on the stomach and back and accelerometer triggered death ray lights up each sleeve. Here is a list of things you need to buy. You can get them all from Sparkfun.com LEDs: https://www.sp
From playlist Software tutorials
15. Introduction to Lagrange With Examples
MIT 2.003SC Engineering Dynamics, Fall 2011 View the complete course: http://ocw.mit.edu/2-003SCF11 Instructor: J. Kim Vandiver License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 2.003SC Engineering Dynamics, Fall 2011
MINNEAPOLIS MOLINE TRACTOR Part 2 Axle Seal & Bearing Replacement tubalcain
Part 2 of 3 parts. Tubalcain shows how to fix an oil leak on his Jet Star. New seals & axle bearings are installed. This job is probably the same for models U302, 4 Star, & Big Mo. I show how to shrink a bearing onto the axle.
From playlist ANTIQUE TRACTORS
DEFCON 13: Introduction to Lockpicking and Physical Security
Speaker: Deviant Ollam Physical security isn't just a concern of the IT world. Besides securing server rooms, locks of all sizes and styles are scattered throughout our lives. However, much of the general public is unaware of the insecurities present in many lock designs. Through discuss
From playlist DEFCON 13
Thanks to @mrtonymui for the dope footage! Go blow up his IG!: https://www.instagram.com/mrtonymui/ Thank you Complex for inviting me to their offices to blow some minds with some Street Magic! Definitely make sure you check out their #LifeAtComplex VLOGS as well as the Sneaker Shopping E
From playlist Street Magic
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From playlist Calculus, Sect 2.2, Intro to limits