Computers and Technology, 02.08.2019 11:30, bussbhsvssu557

The command hashes current and future plaintext passwords in the configuration file into an encrypted ciphertext. sudo passwd root login crypto password service password-encryption enable password

Answers: 2

Show answers

Similar questions

Computers and Technology, 05.09.2019 00:30, mookdag

If you configure any more passwords on the switch, will they be displayed in the configuration file as plain text or in encrypted form? explain

Answers: 3

continue

Mathematics, 02.10.2019 00:10, sandywarren8789

An affine cipher is a type of simple substitution where each letter is encrypted according to the following rule c = (a p + b) mod 26. here, p, c, a, and b are each numbers in the range of 0 to 25, where p represents the plaintext letter, c the ciphertext letter, and a and b are constants. for the plaintext and ciphertext, 0 corresponds to "a," 1 corresponds to "b," and so on. consider the ciphertext qjkes reogh gxxre oxeo, which was generated using an affine cipher. determine the constants a and b and decipher the message. hint: plaintext "t" encrypts to ciphertext "h" and plaintext "o" encrypts to ciphertext "e."

Answers: 3

continue

Computers and Technology, 06.10.2019 05:30, mari8493

In cryptography, we use encryption ciphers to encode ("encrypt") a plaintext into a ciphertext. in theory the ciphertext is only readable by someone who knows how the plaintext was encrypted. if they have this information they can "decrypt" and recover the plaintext. there are some very simple ciphers, known as "substitution ciphers". they're so simple that they're not used any more because they are easy to but they are great for us because they are easy to program! first is the "rot13" cipher. rot13 rotates each letter 13 positions in the alphabet. so an a becomes an n, and an o becomes a b. (the rotation wraps). if the rot13 cipher is applied a second time, the original plantext is restored: n becomes a, b becomes o. obviously the rot13 cipher provides no security! it's really used in various places on the internet to hide joke punch-lines or spoilers. another cipher, the "caesar cipher", is a substitution cipher with a little more security. the cipher uses a dictionary where each plaintext letter has a corresponding ciphertext letter paired with it. for example we might say a is substituted with m, bis substituted with x, etc. to encrypt, each letter is replaced with its ciphertext letter. to decrypt, the reverse process takes place: each ciphertext letter is replaced with the plaintext letter. this cipher is not particularly strong. it is quite easy to guess the plaintext-ciphertext mappings by exploiting knowledge of letter frequency and word length. it is, however, harder to break than rot13 for this assignment, we will write a c++ program capable of doing 4 things: 1. perform a rot13 substitution 2. perform a caesar encryption given a dictionary 3. perform a caesar decryption given a dictionary 4. create a random caesar cipher dictionary the format for the caesar cipher dictionary is a file with 26 pairs of letters, one per letter of the alphabet, in alphabetical order. each pair has two letters: the plaintext letter and the ciphertext letter. the pairs are separated by whitespace. while the dictionary contains only lowercase letters, the mappings also apply for uppercase letters. note that the ciphertext letters must be unique; you cannot have two different plaintext letters that map to the same ciphertext letter. for all of the substitution operations, all upper and lower case letters on input should be substituted (or rotated as the case may be) before being output. all other characters are simply copied unchanged from input to output. the program takes several command line arguments. the first, which is required, tells the program what operation to perform: perform rot 13 substitution. generate a random caesar cipher dictionary encrypt using the caesar cipher decrypt using the caesar cipher if the first argument is missing, the program should print missing command, then stop. if the first argument is not one of the four listed above, print the first argument followed by a space and not a valid command, then stop. for -r, there is an optional second argument. if provided, it is the name of the file to read from. if it is not provided, the program should read from standard input. the output should be generated to the standard output. if a filename is provided but the file cannot open for any reason, the program should print the filename followed by a space and file could not be opened, then stop for-g, the dictionary should be printed to the standard output. you must ensure that each plaintext letter maps to a unique ciphertext letter. for both -e and -d there is a required second argument, which is the filename of the dictionary. if the second argument is missing, print the message no dictionary given, and stop. if the dictionary cannot open for any reason, the program should print the filename followed by a space and dictionary could not be opened, then stop. when reading the dictionary, you must ensure that each plaintext letter maps to a unique ciphertext letter. if you find a case where the dictionary is not in alphabetical order, you must print missing letter l, where l is the missing letter, and stop. both -e and -d support an optional third argument, which is the file to read from. if it is not provided, the program should read from standard input. the output should be generated to the standard output. if a filename is provided but the file cannot open for any reason, the program should print the filename followed by a space and file could not be opened, then stop. in all cases if there are too many command line arguments, your program should print too many arguments, then stop.

Answers: 2

continue

Do you know the correct answer?

The command hashes current and future plaintext passwords in the configuration file into an encrypt...

Questions in other subjects:

History, 30.09.2019 06:00

Which colonial region is best described by the phrases in the box below? • natural resources included fish and timber • poor farming conditions and long cold win...

Biology, 30.09.2019 06:00

Abacterium would be considered? a. unicellular b. a cell c. an organism d. all the above...

English, 30.09.2019 06:00

Read the excerpt from robert frost's "a girl's garden" and identify its rhyme scheme. a neighbor of mine in the village likes to tell how one spring w...

Mathematics, 30.09.2019 06:00

If 12 is 10% of the value what is that value...

Mathematics, 30.09.2019 06:00

The diameter of a circle is 10 meters. what is the area of the circle? (use 3.14 for and round to the nearest tenth.) a.31.4 m b.62.8 m c.78.5 m d.125.6 m...

Biology, 30.09.2019 06:00

How do the rods and cones in the eye differ...

Mathematics, 30.09.2019 06:00

13/5=4/x solve for x to the nearest .01...

Mathematics, 30.09.2019 06:00

What is the measure of the missing angle? ...

History, 30.09.2019 06:00

The freedom and justice party, backed by the muslim brotherhood, was the big political winner in...

English, 30.09.2019 06:00

Identify the figurative or literal meanings of the phase. josh is a bulldozer on the football field. a) ironic b) literal c) idiomatic d) metaphorical.....

Other tasks in the category: Computers and Technology More task