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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.
A symbol invented by John Dee, alchemist and astrologer at the court of Elizabeth I of England. It represents (from top to bottom): the moon; the sun; the elements; and fire. Ouroboros: Ancient Egypt and Persia, Norse mythology: A serpent or dragon consuming its own tail, it is a symbol of infinity, unity, and the cycle of death and rebirth ...
Pigpen cipher. The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [ 1] The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [ 2][ 3] is a geometric simple substitution cipher, which exchanges letters ...
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption —a series of well-defined steps that can be followed as a procedure. An alternative, less common term is encipherment. To encipher or encode is to convert information into cipher or code. In common parlance, "cipher" is synonymous with "code", as ...
t. e. In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by ...
However, in cryptography, code has a more specific meaning: the replacement of a unit of plaintext (i.e., a meaningful word or phrase) with a code word (for example, "wallaby" replaces "attack at dawn"). A cypher, in contrast, is a scheme for changing or substituting an element below such a level (a letter, a syllable, or a pair of letters, etc ...
A. Abracadabra, an ancient word in an unknown language popularly carved onto amulets in antiquity. Abramelin oil. Acultomancy, divination by the use of needles. Adept. Agartha, a land at the center of the Earth. Ailuromancy, divination by the movements of cats. Akasha, thought to be the fifth element in many forms of Neopaganism. Akashic Records.
Pirate code. Treasure being divided among pirates in an illustration by Howard Pyle. A pirate code, pirate articles, or articles of agreement were a code of conduct for governing ships of pirates, notably between the 17th and 18th centuries, during the so-called "Golden Age of Piracy". The typical pirate crew was an unorthodox mixture of former ...