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Other simple encryption ciphers like the Polybius square used a polyalphabetic cipher that listed each letter with the corresponding numeric positions across the top and side to tell where the position of the letter was.Using a table like the one above you would write the letter “G” as “23”, or “GEEK” as “23 31 31 43”.
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The Data Encryption Standard (DES) is a block cipher (a form of shared secret encryption) that was selected by the National Bureau of Standards as an official Federal Information Processing Standard (FIPS) for the United States in 1976 and which has subsequently enjoyed widespread use internationally.
Concerns about security and the relatively slow operation of DES in software motivated researchers to propose a variety of alternative block cipher designs, which started to appear in the late 1980s and early 1990s: examples include RC5, Blowfish, IDEA, New DES, SAFER, CAST5 and FEAL The Rijndael encryption algorithm was adopted by the US Government as standard symmetric-key encryption, or Advanced Encryption Standard (AES).
A rollercoaster decade-and-a-half culminated in the celebration of #15yearsofawesome at 2017’s really Awesome gaming expo (r Age), which took place between 6 October and 8 October.
It revealed an industry that is South African cosplay is growing rapidly, with local cosplayers constantly refining their craftsmanship and skill levels – putting top local players on par with international cosplayers.