Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...

1. Introduction -- 2. From Julius Caesar to simple substitution -- 3. Polyalphabetic systems -- 4. Jigsaw ciphers -- 5. Two-letter ciphers -- 6. Codes -- 7. Ciphers for spies -- 8. Producing random ...

Cipher Mining, Inc. operates as a Bitcoin mining ecosystem in the United States. The firm is developing a cryptocurrency business. The company was founded in 2021 and is headquartered in New York, NY.

December 24, 2025 • The fight over the soul of higher education is very alive right now, with the Trump administration engaged in dozens of investigations and multiple lawsuits against colleges and ...

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The United States House of Representatives has voted forward a bill that would end the restrictive Caesar Act sanctions on Syria, originally imposed during the rule of former leader Bashar al-Assad.

When the IBM PC was new, I served as the president of the San Francisco PC User Group for three years. That’s how I met PCMag’s editorial team, who brought me on board in 1986. In the years since that ...