Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#2153

1.) The concept of public and private is to create a safe and secure digital signature. The computer takes you wallet and randomly generate a private key. This number is so astronomical that it most likely won’t be generated more than once. A mathematic function is then used using the private key, to create a public key which is used to create a public address. This is a secure address to send and receive transactions.

2.) The two key use cases for public key cryptography are in cryptocurrency are encryption, and creating digital signatures.

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#2154

  1. Describe the concept of public and private key with your own words.
    A private key it’s a random number created by the computer to give you an Identity.
    A Public key it’s a key available for sharing with everyone. It’s linked to your private key.

  2. What 2 use-cases can public key cryptography be used for?
    Encryption and Digital Signatures.

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#2155
  1. A private key is generated by the sender and is private, no one else has access to the private
    key. The public key is what gets generated from your private key and is exposed to everyone on the blockchain.
    2… -Encryption-Sending/Receiving messages
    -Digital Signature-Sending/Receiving transactions
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#2156

  1. Public and private keys are a way transmitting data over a public network which is both secure and verifiable. The private part is kept secret and the public part can be transmitted safely over an open network.

  2. Public Key Crytography can be used for : a) Encrypting Data, b) Signing data

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#2157

Public and private keys enable the functions of encryption and digital signatures in digital communications or transactions. A private key creates a public key. Public keys enable an encrypted message to be sent that can only be unlocked by its unique private key. Private keys can be used to verify information sent.

2 Use cases: Encryption and Digital Signatures.

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#2159

bitcoin wallet stores your private keys and uses them to sign transactions and checks your balance!

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#2160

  1. A public key is open to the public, while a private key is a large unique key only available to you.

  2. It is encryption and digital signatures

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#2161

Homework on Public and Private Keys - Questions

  1. Describe the concept of public and private key with your own words.
    Public and private keys are used for encryption. It allows anyone to send encrypted messages to me using my public key. And the messages can only be decrypted using my private key, that only I have access to.

I can also encrypt messages using my private key. These messages can be opened by anyone with the public key. But it ensures that the sender is actually who they claim to be, as they are the only ones capable of encrypting the message using their private keys.

  1. What 2 use-cases can public key cryptography be used for?
    Digital signatures: making sure that the sender is actually who they claim to be and not an imposter. Also used in cryptocurrency with Bitcoin instead of messages: you send Bitcoin using your private key and receive Bitcoin using your publicly available key.
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#2162

  1. Public and privet key are used to encrypt a message. Receiver´s privet key (random numbers) is used to create a public key and for decryption of a message.

  2. Uses of public key cryptography:

  • encrypting communication to provide confidentality
  • digital signiture
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#2163
  1. Describe the concept of public and private key with your own words.
    –Public Key is a code that the public network can see, but they can not see the contents that the public key holds. The public key can only be unlocked by the private key. The private key is a computer generated code that holds the contents of a transaction. The private key is the signature that verifies the sender of the public key. The public key can never be used to unlock the private key. Only the private key can unlock the public key, it is a one way process.
  2. What 2 use-cases can public key cryptography be used for?
    –Encryption
    –Digital Signature
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#2164

1. Describe the concept of public and private key with your own words.
Private key is a unique random number generated by your computer whereas public key is another random number derived from your private key.

2. What 2 use-cases can public key cryptography be used for?
a) Encryption
b) Digital signature and checking integrity of massages.

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#2165

  1. A private key is a random number generated by a computer, and is meant to be kept private - very private! That number can then put into the math machine and out comes a public key. The public key is derived from the private key, but trying to reverse the math and uncover what the original private key is virtually impossible, making the public key a number that is safe to be in public view. Having these two keys enables one to have insurance/verifiability that the digital identity you are interacting with is actually the person/entity that you think they are, while also providing a layer of security for that digital identity’s contents/data/money through encryption.

  2. Public key cryptography could be used for sending emails, signing contracts, making any kind of digital transaction.

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#2166
  1. Private key is the key we keep safe and dont disclose. that is use to decrypt message where the message is incrypted with public key that public key is generated by private key.
    2.Basicly digital signature verify that who set the message since public key derives from private key and that public key creates the bitcoin address. So to recieve bitcoin to bitcoin address and send bitcoin by using private key.
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#2167

Hey you are correct! :slight_smile: But you posted in the wrong thread :stuck_out_tongue:

#2168

You digitally sign messages with your private key and others can encrypt a message for you with your public key :slight_smile:

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#2169
  1. Describe the concept of public and private key with your own words.
    –> the private key is any random number or phrase which can be used to generate a public key through the sha256 function. the public key can then be used the encrypt messages which can just be decrypted by using the private key.
  2. What 2 use-cases can public key cryptography be used for?
    –> the two main use cases are encryption and digital signatures.
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#2170

Public key is for the world to see and use. And private key is only for you.

Encryption and digital signature.

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#2171
  1. Describe the concept of public and private key with your own words.

The private key is generated by a random number, with this private key a public key can be generated. One key encrypts the message and the other key decrypts the message.

  1. What 2 use-cases can public key cryptography be used for? 1. Encryption and 2. Digital Signatures
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#2172

Homework on Public and Private Keys - Questions

  1. Describe the concept of public and private key with your own words.
    Public and Private keys enable users to send data over an unsecured network, visible to others, in a way that others are not able to see the contents of the data without the matching key.

I can create a Private key by generating a random (very large) number, then use that Private key to create a Public key that is dependant on the correct Private key to open the contents to view the data.

  1. What 2 use-cases can public key cryptography be used for?
    Encryption & Digital Signatures
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#2173
  1. The concept of public and private keys is basically to have a secure and a public identifier, such that the public identifier gives the public access to sending data to you while the secure/secret identifier allows you to validate the fact that transactions are being generated by you.
  2. Two use cases for public key cryptography are remittance of cryptocurrencies and secure delivery of encrypted messages.
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