Aaron Parecki

#cryptography

• 

  First plot on my #AxiDraw was successful!
  
  This is a sha256 hash of my name, each ring represents 4 characters of the hash.
  
  A hash is a transformation of an arbitrary-sized value into another value of fixed size. Hash functions that are one-way, i.e. cannot be reversed, are the basis of modern cryptography and security on the Internet. Given this image, you wouldn't be able to reverse it to find out the original string, but every time I run the hash on the same string it will output the same value.

  

  Portland, Oregon, USA • 63°F

  5 likes 2 reposts

  Sun, Oct 3, 2021 6:48pm -07:00 #generativeartworks #axidraw #plotparty #generativeart #algorithmicart #cryptography #sha256 #2d
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  My first attempt at computational line art!
  
  This image is a representation of a sha256 hash of an input string, my name. Each ring represents 4 characters of the hash, and is the binary representation of the character's ascii value.
  
  A hash is a transformation of an arbitrary-sized value into another value of fixed size. Hash functions that are one-way, i.e. cannot be reversed, are the basis of modern cryptography and security on the Internet. Given this image, you wouldn't be able to reverse it to find out the original string, but every time I run the hash on the same string it will output the same value.
  
  The next step is to load this into my #AxiDraw and plot it on some actual paper!

  

  Portland, Oregon, USA • 70°F

  6 likes 1 repost

  Sat, Oct 2, 2021 5:05pm -07:00 #generativeartworks #plotparty #generativeart #algorithmicart #sha256 #cryptography #2d #lineart #axidraw
• Ok Google: please publish your DKIM secret keys – A Few Thoughts on Cryptographic Engineering (blog.cryptographyengineering.com)

  Tue, Nov 17, 2020 7:54am -08:00 #email #dkim #cryptography #security
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  "Cryptography turns hard security problems into hard key management problems" @cperciva at #Oktane20

  Portland, Oregon • 44°F

  25 likes 6 reposts 2 replies 1 mention

  Wed, Apr 1, 2020 11:43am -07:00 #cryptography #crypto #oktane20
• Prime factoring with PHP (www.thatsgeeky.com)

  Thu, Aug 4, 2011 1:10am -07:00 #algorithm #cryptography #factors #math #prime
• Penny Black (research.microsoft.com)

  Thu, Aug 4, 2011 12:55am -07:00 #cryptography #email #indieweb #messaging #spam #tantek
• Matasano Security LLC - Chargen - Enough With The Rainbow Tables: What You Need To Know About Secure Password Schemes (chargen.matasano.com)

  Fri, Sep 10, 2010 8:57am -07:00 #algorithm #authentication #crypto #cryptography #database #encryption #hash #md5 #password #php #security #web
• ImperialViolet - Overclocking SSL (www.imperialviolet.org)

  Tue, Aug 3, 2010 10:37am -07:00 #crypto #cryptography #google #scalability #ssl
• Alice and Bob - Wikipedia, the free encyclopedia (en.wikipedia.org)

  Wed, Jun 23, 2010 11:40am -07:00 #alice #bob #crypto #cryptography #documentation