The 2016 Academy Awards Could Change Everything â UPDATE. BEVERLY HILLS, CA - JANUARY 10: Actor Leonardo DiCaprio, winner of Best Performance by an Actor in a Motion Picture - Drama for 'The Revenant,' poses in the press room during the 73rd Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 10, 2016 in Beverly Hills, California.
The VigenÃ¨re Cipher. The VigenÃ¨re cipher, was invented by a Frenchman, Blaise de VigenÃ¨re in the 16th century. It is a polyalphabetic cipher because it uses two or more cipher alphabets to encrypt the data. In other words, the letters in the VigenÃ¨re cipher are shifted by different amounts, normally done using a word or phrase as the encryption key .
In cryptography, Stream ciphers and Block ciphers are two encryption/decryption algorithms that belong to the family of symmetric key ciphers. Typically a cipher takes a plain-text as input and produces a ciphertext as output. Block ciphers encrypts fixed-length block of bits using an unvarying transformation.lthough both stream ciphers and block ciphers belong to the family of symmetric encryption ciphers, there are some key differences. Block ciphers encrypt fixed length blocks of bits, while stream ciphers combine plain-text bits with a pseudorandom cipher bits stream using XOR operation.