describe each of the following in a couple of sentences:
• Caesar’s Shift Cipher
• Codes vs. Ciphers
• Kerchoff’s Principle
• Keyword (Keyphrase) cipher
• Railfence cipher
• Scytale
• Steganography
• Substitution cipher vs. Transposition cipher
How would you like us to help you with this assignment?
I will like to know what does my professor want me to do? How to use them in a couple of sentences i guess.
He probably wants you to describe each of these.
Check the second sentence in this site.
http://en.wikipedia.org/wiki/Caesar_cipher
Thank you!
You're welcome.
I do not know if you are doing a cryptography course, or the question is part of a project in math.
In any case, the requested ciphering methods are mostly traditional methods dating back to Julius Caesar, most of which are no longer in use (except Steganography).
If your teacher wants you to write a few sentences about them, it is because he/she wants you to know what they are through research. The best way to achieve this is to look them up and read what you find.
Most, if not all, of the keywords can be googled and returns a Wiki article among others. These articles are very detailed, and enable you to understand how ciphers work. One of the articles stresses the difference between cipher and code, which I think you should also read about.
In case you think this research is a monumental task, be at ease. Wiki articles are written so that the first paragraph tells you what you expect to find out, after a brief one or two sentence definition of the term.
Give it a try and post again if you still have difficulties.
• Caesar's Shift Cipher: Caesar's Shift Cipher, also known as the Caesar Cipher, is a simple substitution cipher where each letter in the plaintext is shifted a certain number of positions in the alphabet. For example, if the shift is 3, then 'A' becomes 'D', 'B' becomes 'E', and so on.
• Codes vs. Ciphers: Codes and ciphers are both methods of encryption, but they differ in how they represent and transform the information. Codes involve substituting words or phrases for specific meanings, while ciphers involve substituting individual letters or blocks of letters according to a specific algorithm or key.
• Kerchoff's Principle: Kerchoff's Principle is a fundamental concept in cryptography that states that the security of a cryptographic system should depend solely on the secrecy of the key, rather than relying on the security of the algorithm itself. In other words, the design and details of the encryption algorithm should be available to the public, while the key remains secret.
• Keyword (Keyphrase) Cipher: A Keyword Cipher, also known as a Keyphrase Cipher, is a substitution cipher that uses a keyword as the key. The keyword is used to determine the order of the letters in the alphabet, which is then used for the substitution. For example, if the keyword is "KEYWORD", the alphabet would be rearranged to "KEYWORDABCDFGHIJLMNPQSTUVXZ".
• Railfence Cipher: The Railfence Cipher is a transposition cipher that rearranges the letters of the plaintext by writing them in a zigzag pattern along a set number of "rails" or lines. The ciphertext is then read off row by row. For example, if the plaintext is "HELLO WORLD" with 3 rails, the ciphertext becomes "L LWDLO".
• Scytale: The Scytale is an ancient transposition cipher in which a strip of parchment or leather is wrapped around a rod of a certain diameter, and the message is written lengthwise along the rod. When unwrapped, the message appears as a jumble of letters, which can only be read correctly if wrapped around a rod of the same diameter.
• Steganography: Steganography is the practice of concealing information within other information in such a way that it is difficult to detect. It involves hiding the existence of a message within another object or file, such as embedding text within an image or audio file.
• Substitution Cipher vs. Transposition Cipher: A substitution cipher involves replacing letters or groups of letters with other letters or symbols according to a specific rule or key, while a transposition cipher involves rearranging the letters of the plaintext without altering the letters themselves. Substitution ciphers focus on replacing individual elements, while transposition ciphers focus on rearranging the elements.