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topjm [15]
3 years ago
6

You and your friend who lives far away want to fairly and randomly select which of the two of you will travel to the other’s hom

e for a visit. Your friend remembers having learned about using hashes as cryptographic commitments and proposes to use a coin toss to decide. He tells you to randomly choose ‘heads’ or ‘tails’ by throwing a coin, hash the result using sha256, and send him the hash. Once you have committed to the outcome, he’ll guess ‘heads’ or ‘tails’, you’ll reveal to him your choice and he can verify that the hash is correct. If his choice matches your coin toss, then your friend wins and you have to make the trip. What is the problem with this scheme, as described?
a.there’s no way to prove that your coin toss is random
b.there’s no way to prove that sha256 is collision resistant
c.your friend can hash all possible options and discover your secret
d.unless you sign the hash message your friend can’t be sure it was you who sent it
Computers and Technology
1 answer:
Phantasy [73]3 years ago
6 0

Answer:

c. your friend can hash all possible options and discover your secret.

Explanation:

SHA-256 is a set of hash functions that was designed by the NSA. SHA-2 is considered an upgrade on the set that was its predecessor, SHA-1. A hash is a mathematical function that condenses data in a process of one-way encryption. SHA-256 creates hash algoritms that are considered irreversible and unique. However, one of the properties of hashing algorithms is determinism, which means that any computer in the world would be able to compute a particular hash and get the same answer.

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Universal Container wants to understand all of the configuration changes that have been made over the last 6 months. Which tool
rosijanka [135]

Answer:

Set up audit trail

Explanation:

The administrator should set up an audit trail in order to get this information.

An audit trail would give him the record of all the configuration changes that have been made in a file or a database in the last 6 months.

Audit trails can be manual or electronic. It provides history and also documentation support. It can authenticate security and also help to mitigate challenges.

4 0
3 years ago
Edhesive 6.8 lesson practice answers
FromTheMoon [43]

Answer:

1.) 25 ; 15 ; 15

2.) 50 ; 15 ; 50

Explanation:

In the first function written :

The variable val was initially decaled or assigned a value of 25 and that was what was printed first.

However, after the example function was written, the val variable was finally assiagned a value of 15 within the function. However, it was also declared that the global variable takes uonthe val value. Hence, the val variable initially assigned a value, of 25 changes to 15 globally.

For the second code :

From the top:

Val was assigned a value of 50 ;

Hence,

print(val) gives an output of 50

Within the function definition which prints the value of val that is assigned a value of 25 within the function.

Since tbe global variable isnt reset.

Printing Val again outputs 50;since ito is outside the function.

6 0
2 years ago
The man-in-the-middle attack<br> means what
Tom [10]

Answer:

<em> where the attacker secretly relays and possibly alters the communications between two parties who believe that they are directly communicating with each other.</em>

Explanation:

4 0
3 years ago
You want to substitute one word with another throughout your
Hitman42 [59]
I’m pretty sure it’s “Find and paste”
8 0
3 years ago
Instructions
Reptile [31]

The assignment is about Telephone, internal combustion engine, and electrical light.

<h3>What is file?</h3>

A file is a  computer system container for storing data. Files used in computers are similar in characteristics to  paper documents used in libraries and office files. There are different types of files like text files, data files, folders, binary and graphic files and these different types of files store different types of data. A computer's operating system can store files  on optical discs, hard drives,  or other types of storage devices.

In most operating systems, a file must have a unique name within a specific directory. However, when creating a file name, some characters are considered illegal and therefore cannot be used. A file name consists of a name with an extension, also known as a file extension. The file extension is the two to four characters after the period of the full file name.

To learn more about file, refer;

brainly.com/question/29055526

#SPJ4

8 0
1 year ago
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