Essays Tagged: "Cipher"

Computer Security, Defines encryption and explain how it is used to protect transmission of information

such as Substitution (character for character replacement) in which one unit (usually character) of cipher text (unintelligible text or signals produced through an encryption system) is substituted fo ... ain text (usually individual characteristics) are simply moved around; they appear unchanged in the cipher text for their relative location.Study Case (Bank of Shenandoah Valley)While both encryption ...

(4 pages) 276 0 3.8 Apr/1997

Subjects: Science Essays > Computer Science

Thomas Jefferson Inventions ... short essay about Thomas Jefferson and his inventions

designed for hillside plowing. His plow designs were often based on mathematical formulas.The Wheel Cipher was another one of Jefferson's many inventions. This invention was made between the years 179 ... ly faced with controversial foreign policy and national security problems. The purpose of the Wheel Cipher is so that a person could scramble and unscramble letters in order to code messages. It was m ...

(2 pages) 65 0 3.7 Mar/2003

Subjects: Social Science Essays > Political Science > Politicians

Not all Abolitionists of 19th century America were alike.

nations, were, in comparison with ours, under this enlightened and Christian nation, no more than a cipher-- or, in other words, those heathen nations of antiquity, had but little more among them than ...

(5 pages) 69 0 4.2 May/2003

Subjects: History Term Papers > North American History

This essay deals with all that leads to a life of crime.

ine, one point, being the consumer and the final point being the producer. One must look at it as a cipher, a cirlce consisting of three hundred sixty degrees, a cipher that will never end. What comme ... cirlce consisting of three hundred sixty degrees, a cipher that will never end. What commences this cipher, is the selling of the product, that can range from marijuana to crack cocaine. The consumer ...

(3 pages) 34 0 3.0 Jul/2003

Subjects: Social Science Essays


ording to the dictionary, steganography (also known as "steg" or "stego") is "the art of writing in cipher, or in characters, which are not intelligible except to persons who have the key; cryptograph ... he human visual system* To hide data in images, understanding palette is essential* Any plain text, cipher-text, other images, or anything that can be embedded in a bit stream can be hidden in an imag ...

(5 pages) 61 0 0.0 Oct/2003

Subjects: Science Essays > Computer Science

"The Code Book by Simon Singh"

graphy has been used as early as the Greek Empire. The main difference between then and now was the cipher or method used to code or hide information. Ancient people used concealment methods as oppose ... ould equal another ("a" became "c"). Thus, this method of coding something is called Caesar's shift cipher. Caesar used this method of coding so much that Valerius Probus wrote a treatise on his ciphe ...

(10 pages) 38 0 0.0 May/2004

Subjects: History Term Papers > World History > World War II


INTRODUCTIONCRYPTOGRAPHY the science of the enciphering and deciphering of messages in secret code or ciphercryptography is used everywhere it pro ... o keep secret documents secure from foreign governmentsTERMINOLOGYCRYPTOGRAPHY the science of the enciphering and deciphering of messages in secret code or cipher.PLAINTEXT the original message before ... ssages in secret code or cipher.PLAINTEXT the original message before encryption or after decryptionCIPHERTEXT The encrypted form of the PLAINTEXTENCRYPTION The process of converting the PLAINTEXT int ...

(5 pages) 116 0 4.2 May/2004

Subjects: Science Essays > Mathematics

Formation of United Nations and Canada's Involvement.

tember 1945: Gouzenko AffairOn Sept. 5, 1945, just after the end of the Second World War, a Russian cipher clerk named Igor Gouzenko (pictured left) fled the Soviet Embassy in Ottawa with 109 document ...

(3 pages) 32 0 4.0 Sep/2005

Subjects: History Term Papers > North American History > Canadian History

Discuss the Importance and Dramatic Impact of the Inspector's Final Speech in "An Inspector Calls" by J.B.Priestley.

estley wrote this play to deliver a moral message to the audience. He uses the Inspector Goole as a cipher to allow him to do this. He also uses the Inspector to play on all of the characters' guilt t ...

(2 pages) 25 2 3.0 Oct/2005

Subjects: Literature Research Papers > European Literature > Authors

The Simple Mathematics of Cryptology

short time, but first, lets discuss what roles mathematics plays in cryptology.The simplest type of cipher is the monoalphabetic substitution cipher (Lewand 1). As its name suggests, this enciphering ... of a message (the plaintext message) with a unique alternate character to obtain an encryption (the ciphertext message). For example, you may choose to replace each occurrence of the letter b in the m ...

(3 pages) 29 0 2.0 Apr/2006

Subjects: Science Essays > Mathematics


s (like the Internet) so that only the intended recipient can read it.A cryptographic algorithm (or cipher) is a mathematical function used in the encryption and decryption process. It works in combin ... key (a word, number, or phrase) to encrypt the plaintext. The same plaintext encrypts to different ciphertext with different keys. The security of encrypted data is entirely dependent on two things: ...

(1 pages) 32 0 0.0 Feb/2008

Subjects: Science Essays > Computer Science


solve [1]. All forms of encryption are based on cryptology which is "the science of analyzing and deciphering codes and ciphers and cryptograms" [2]. Cryptology and simple codes have been used as earl ... been used as early as the Roman Empire. The earliest encryption methods include using substitution ciphers and transposition ciphers which can be done using pen and paper [3]. However, encryption dis ...

(5 pages) 59 0 3.0 Nov/2008

Subjects: Science Essays > Computer Science


d War II when covert communications were crucial and governments employed hundreds of experts to "encipher" and "decipher" secret messages. (Russell, 57). During World War II, cryptography was mainly ... a very powerful secret code named "Purple"that was broken in 1939 after the invention of the Purple Cipher Machine by William Friedman who was a true pioneer in cryptology. (Russell, 83) After the fai ...

(2 pages) 1 0 0.0 May/2013

Subjects: Science Essays > Computer Science