1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sertanlavr [38]
3 years ago
14

a password to a certain database consists of digits that cannot be repeated. if the password is known to consist of at least 8 d

igits and it takes 12 seconds to try one combination, what is the amount of time, in minutes, necessary to guarantee access to the database
Computers and Technology
1 answer:
BaLLatris [955]3 years ago
7 0

Answer:

\frac{10!}{2}mins

Explanation:

12 seconds to try one combination will be equivalent to  \frac{1}{12}\times 60 = \frac{1}{5} \ mins

Password contain at least 8 digit i.e. password can contain 8, 9, 10 digit.

Password cannot contain more than 10 digit because it will give room for repetition which it is clearly stated that digit cannot be repeated.

Possible digit that can be used: 9,8,7,6,5,4,3,2,1,0.

Total number of passwords combination possible for each position in 8 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3. Total number of passwords combination possible in 8 digit is equivalent to \frac{10!}{2}.

Total number of passwords combination possible for each position in 9 digit.  

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3, 9th position = 2. Total number of passwords combination possible in 9 digit is equivalent to \frac{10!}{1}.

Total number of passwords combination possible for each position in 10 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3, 9th position = 2, 10th position = 1.  Total number of passwords combination possible in 10 digit is equivalent to 10!.

Adding them up and multiplying by  \frac{1}{5} \ mins  to get the total number of time needed to guarantee access to database =  [\frac{10!}{2}\times\ \frac{10!}{1} \times 10!] \frac{1}{5}\ mins = \frac{10!}{2}

You might be interested in
Exercise : Randomizer In this exercise, we are going to create a static class Randomizer that will allow users to get random int
Nutka1998 [239]

Answer:

Here the code is by using java.

Explanation:

//Randomizer.java

public class Randomizer {

public static int nextInt() {

//get random number from 1-10

int randInteger = (int) (Math.random() * (11) + 1);

//if number is greater than 10 or less than 1

while (randInteger > 10 || randInteger < 1) {

randInteger = (int) (Math.random() * (11) + 1);

}

return randInteger;

}

public static int nextInt(int min, int max) {

//formula to get random number from min-max

int randInteger = (int) (Math.random() * (max + 1) + min);

while (randInteger > max || randInteger < min) {

randInteger = (int) (Math.random() * (max + 1) + min);

}

return randInteger;

}

}

//RandomizerTester.java

public class RandomizerTester {

public static void main(String[] args) {

System.out.println("Results of Randommizer.nextInt()");

for (int i = 0; i < 10; i++) {

System.out.println(Randomizer.nextInt());

}

int min = 5;

int max = 10;

System.out.println("\n Results of Randomizer.nextInt(5,10)");

for (int i = 0; i < 10; i++) {

System.out.println(Randomizer.nextInt(min, max));

}

}

}

OUTPUT:

Results of Randommizer.nextInt()

9

2

3

8

5

9

4

1

9

2

Results of Randomizer.nextInt(5,10)

9

8

9

7

5

10

5

10

7

7

4 0
2 years ago
(Drag each tile to the correct box)While surfing online, Patricia first checks her email and reads the latest messages. She then
Marizza181 [45]

Answer:

When Patricia checks her email use:

POP3

TCP

IP

When Patricia brows a website and log in to post a comment use:

HTTP

TCP

IP

LDAP

Explanation:

Email protocol

Patricia starts to check her email, the email application uses the protocol POP3.

The protocol TCP makes a connection with the server and transport the data.

Patricia receives her emails with the protocol IP on her computer.

Website protocol

Patricia started to surf and the protocol HTTP makes a connection with the internet.

The protocol TCP makes a connection with the server and transport the data.

With the protocol IP, she receives the website data.

With the protocol LDAP, Patricia makes a login to post the comment.

6 0
3 years ago
What helps companies and organizations to target masses of people, provide 24/7 services, and deliver better marketing in a chea
Sever21 [200]
The money their making
6 0
4 years ago
What is the legal right granted to all authors and artists that gives them sole ownership and use of their words, software, pict
ICE Princess25 [194]

Answer:

copyright

Explanation:

3 0
3 years ago
Out of a list of the values 2, 45, 18, 22, 8, and 37, what result would the MAX function return?
Vika [28.1K]
37 most likely.
No programming language is specified, and you didn't put what the function is, so assuming it's already implemented, MAX should display the highest number.
8 0
3 years ago
Read 2 more answers
Other questions:
  • The ________ occurs when the user presses the enter key without typing a value for an input operation.
    5·1 answer
  • The negotiators past relationship will affect current behavior if the parties
    12·1 answer
  • The computer component that makes sure that instructions are decoded and executed properly is the ___________.
    11·2 answers
  • create a boolean variable called sucess that will be true if a number is between -10 and 10 inclusively python
    11·1 answer
  • Which item is most important for a successful website design?
    6·2 answers
  • Identify three best -selling tablet on the market, and decide on the one that you would like to buy? justify your respone
    9·1 answer
  • Vicky is investigating multiple hacking attempts on her cloud-based e-commerce web servers. She wants to add a front-end securit
    5·1 answer
  • What function is used to return the results in column D?
    11·1 answer
  • This feature automatically creates tables of contents.
    5·1 answer
  • What does an arrow after a command indicate
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!