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Bangalore, India based company providing an online contest like environment aiming at providing recruitment assessment solutions. HackerRank: HackerRank offers programming problems in different domains of Computer Science. It also hosts annual Codesprints which help connect the coders and Silicon Valley startups. LeetCode
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet .
[2] HackerRank categorizes most of their programming challenges into a number of core computer science domains, [3] including database management, mathematics, and artificial intelligence. When a programmer submits a solution to a programming challenge, their submission is scored on the accuracy of their output.
The following attack on the Caesar cipher allows full recovery of the secret key: Suppose the adversary sends the message: Attack at dawn, and the oracle returns Nggnpx ng qnja. The adversary can then work through to recover the key in the same way as a Caesar cipher. The adversary could deduce the substitutions A → N, T → G and so on. This ...
Kasiski actually used "superimposition" to solve the Vigenère cipher. He started by finding the key length, as above. Then he took multiple copies of the message and laid them one-above-another, each one shifted left by the length of the key.
A key concept in epistemic logic, this problem highlights the importance of common knowledge. Some authors also refer to this as the Two Generals' Paradox, the Two Armies Problem, or the Coordinated Attack Problem. [1] [2] The Two Generals' Problem was the first computer communication problem to be proven to be unsolvable. [3]
During his early career, Caesar had seen how chaotic and dysfunctional the Roman Republic had become. The republican machinery had broken down under the weight of imperialism, the central government had become powerless, the provinces had been transformed into independent principalities under the absolute control of their governors, and the army had replaced the constitution as the means of ...
Caesar's civil war (49–45 BC) was a civil war during the late Roman Republic between two factions led by Gaius Julius Caesar and Gnaeus Pompeius Magnus (Pompey). The main cause of the war was political tensions relating to Caesar's place in the republic on his expected return to Rome on the expiration of his governorship in Gaul.