Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#4748

1)Public and private keys in the use of Bitcoin and the blockchain are used to identify who performs transactions.
2)Message cryptography and digital signature.

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#4749
  1. In order to create a Bitcoin Wallet, the private key generates a public key which creates the Bitcoin address. This process has two step hash so it is absolutely unlikely to crack the private key.
  2. Encryption and Digital Signatures, which ensure identification and integrity of data…
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#4750

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

A private key is a randomly generated large number that is run through some irreversible math operation (like SHA256) to generate a public key. It is impossible to go from the public key to the private key.

2. What 2 use-cases can public key cryptography be used for?
The 2 main use cases of private-public key cryptography are encryption and transaction signing.

In encryption, the sender uses the public key of the recipient to encrypt a message (string text, image, etc.) which is then sent to the recipient. After receipt of the data message, the recipient then uses his/her private key to decrypt the message.

In transaction signing, which is the main use case of public/private key cryptography in bitcoin, your private key is used to sign transactions on the bitcoin network. Nodes on the bitcoin network can then verify that the transaction came from you by viewing the correspondence between the signature on the transaction and your public key (since both the signature and public key came from the same private key belonging to you).

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#4751
  1. Your private key is kept a secret, and can be used to decrypt messages sent from a public key. A public key is generated from one’s private key and is shared with anyone, anywhere.
  2. The 2 use cases for public key cryptography are in encryption and digital signatures.
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#4752

  1. My concept of a Public Key and Private Key is that a Private Key should be kept Secret ; Protected in high regard. (Private Key = Wallet Withdraw), as to where a Public Key can be disseminated / shared Globally. Public Key = (Wallet Deposit).

  2. The 2 use cases for public key cryptography are 1, Encryption and 2. Digital Signatures.

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#4753
  1. The public key is what you share with others and use to encrypt data. The private key is your personal key used to decrypt messages and sign.
  2. Two uses for public key cryptography are for encryption and digital signatures.
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#4754
  1. private key is used to decrypt the information but to receive it the public key is used.
  2. Public key cryptography is used for public, for other people to send messages and other sorts of information. It is available for everyone.
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#4755

  1. Private key is a pair of large numbers which inversely one-way from eachother, what is used to generate a public key. A private key can be utilized as sign / validate a wallets operation in connection when utilizing the private key.

  2. The public key can be used to:
    encrypt messages
    digitally sign
    decrypt public key
    encrypt public key

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#4756

  1. Describe the concept of public and private key with your own words.
    A private key is randomly-generated number from which is derived a public key. The public key is provided to other parties, who then send messages, transactions, etc. to your public key. The private key is used to unencrypt messages/transaction sent to you. It’s also used for digital signatures.

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

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#4757

Public-key cryptography is an encryption scheme that uses two mathematically related, but not identical, keys - a public key and a private key. The public key is used to encrypt and verify digital signatures, and the private key is used to decrypt and create digital signatures. It is not used to decrypt or encrypt public key.

#4758
  1. Private key is where you can store your crypto and it encrypted but random number. Public key people can see everything.
  2. Encryption and digital signatures
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#4759

1. Describe the concept of public and private key with your own words.
The private key is a randomly generated code that a person keeps only to themself. The public key is generated from the private key but is a one-way function just like hashing, and cannot be traced back to the private key. People can use public keys to encrypt and send data which can then be read/opened by the holder of the private key.

2. What 2 use-cases can public key cryptography be used for?
Instant messaging and email.

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#4760

Homework on Public and Private Keys - Questions

  1. Describe the concept of public and private key with your own words.
  • A public key is used to give an address for people to interact with a wallet, and a private key is used to verify that someone owns that wallet.
  1. What 2 use-cases can public key cryptography be used for?
  • To send messages and to send value (i.e.- BTC)
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#4761

The second use case is digital signature.

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#4762

  1. The concept of public and private key is to be able to send
    private message wherein only the receiver can see it. The computer
    creates a private key to send the message. The private key generates
    a public key so the receiver can access the message.

  2. The public key can be used to verify the sender. And the receiver can
    send an encrypted message back to the sender using the public key.

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#4763

  1. Describe the concept of public and private key with your own words.
    -A private key is a computer generated random number. A public key is a number derived from from the private key through an equation. The public key will be used as you Bitcoin address

  2. What 2 use-cases can public key cryptography be used for?

Digital signatures and Encryption.

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#4764

  1. a public/private key pair is essentially an input to a hash function (private key, only known by the input-er) and its output (public key, able to be publicized because it gives next to no information about the input); there are varying levels of complexity one can apply to the input, fir example using a more secure hash function or starting with a random number as a seed fed into a hash function that could be used as the input to the NEXT hash function, etc.

  2. the two we’re talking about here are data encryption (in which one can take the public key and use it to somehow encrypt the data in a way that only the private key can decrypt) and digital signature (in which similarly one can use the public key and signature to check mathematically whether the signature came from the owner of the public key…don’t ask me how)

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#4765

  1. A public key is the address that is shared with other people so transactions can be received. A private key is personal and used to login/import wallets.

  2. Public key cryptography is used to send encrypted messages and digital signatures.

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#4766

  1. Private key is your own private wallet which should not be disclosed to others as it has your signature and everything, public key is what other people can see within the network.

  2. 2 use-cases public key crypto be used for encryption & digital signature.

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#4767

  1. The relationship between public and private keys are that of a one way function. The private key generates the public key. One cannot, however, derive the private key from the public key.

a) encryption
b) Digital Signature

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