Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#4908

  1. Public key can be used to encrypt sensitive info and private keys can be used to decrypt that info if you are the intended receipeant.

  2. It can be used to encrypt and decrypt messages or to verify the information was sent by the real person.

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#4909
  1. Public keys are used by a person as a way to identify and communicate on a public network. Each person can also generate their own private keys that are only used by that person and shouldn’t be shared.
  2. Encryption sending secretive messages over a public network and digital signatures.
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#4910
  1. Describe the concept of public and private key with your own words.

A public key is a message that is received encrypts the message that is send and the private key is the one that gives the identity to that message

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

to send a codified message
to encrypt the private key

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#4911

  1. A private key is a computer generated random number from which we can derive a public key. The public key of a receiver can then be used to encrypt messages that can only be decrypted by using the private key.

  • Encryption like in the example above,
  • Digital signatures that can be generated using a private key which a receiver can then verify using the public key of the signer.
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#4912
  1. Public key = shared among everyone, public
    Private key = very large number, generated by a computer, kept secret
  2. Public key cryptography can be used for encryption and for digital signatures, such as identification, verifying integrity of the messages or who sent them.
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#4913

1.- Private key is an alphanumerical code that corresponds to a bitcoin address, and the key to manage transactions from it. A wallet stores it, and allows user to sign transactions or messages, and create public keys.
Public key is generated from a private key, with it any other user can verify signed transactions or messages.

2.- Use cases for the public key cryptography are to receive transactions and to verify any signature done with the same private key.

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#4914
  1. Describe the concept of public and private key with your own words.
    An individual produces a private key, and from that private key they can produce a public key. Other people can send messages to your public key but you you would have to use the private key to de-crypt the message. Private keys also are used for digital signatures.
  2. What 2 use-cases can public key cryptography be used for?
    Can be used to send messages that you’d be able to de-crypt with your private key. Also a address to send forms of digital currency that use a digital signature.
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#4915
  1. After creating a private key you can get a public key out of it and share it. Anyone can see the public key and encrypt messages with it. only the owner of the private key can decrypt the message with the private key. he can also signature message with the private key.
  2. For transaction signing and wallets in a public blockchain
#4916

And the second use case is for encryption.

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#4917
  1. Describe the concept of public and private key with your own words.

with the generation of a private key a public key is generated as well. the public key does not disclose information over the private key. the private key is needed to gain access to the funds. others can send information to the public key and the private key is needed to access it.

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

encryption and signatures

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#4918

Describe the concept of public and private key with your own words.
Private Key is a random very large number that is generated for you only, this is the key that will be used to either decrypt a message or digitally sign a transaction.

Public Key is another very large number that is derived from the private key. This key can be shared with the world, so that, any encrypted messages that are encrypted with a specific public key can only be decrypted by the owner of the respective private key. From a CryptoCurrency perspective, the public key is used to confirm the digital signature.

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

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#4919

  1. Describe the concept of public and private key with your own words.
    You have your private key which you always keep safe. You use it to sign your actions. If somebody accesses you private key he will be able to view your private information and to act using your identity.
    Public key is for the people to see. They use it to encrypt data sent to you so no one else can access it.

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

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#4920
  1. Describe the concept of public and private key with your own words.

Private key is a set of numbers. Public key is derived from private key. It is used to encrypt (for example) a message, that can be decrypted with the private key.

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

It can be used for signing and encrypting.

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#4921
  1. private keys are a number of digits created be ur computer that only u see, public key is the generated number from ur private key that others can see.(noone can figure out the private key from the publiuc key)
  2. encrypted messagas and signature of public key to verify trans.
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#4922
  1. Describe the concept of public and private key with your own words.

Public key is a key that is open to everyone in the system and in cryptography used for encryption. On the other hand, a private key is a sensitive key that should not be shared with anyone and used for decryption purposes.

  1. What 2 use-cases can public key cryptography be used for?
  • Digital Signature
  • Encryption
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#4923

  1. The concept of public and private key can be described thus; a private key is a set of random numbers generated by a computer that is universally collision resistant, in cryptocurrencies, the private key generates a digital signature that can be attached to encrypted messages and used to verify the identity of the sender of a message and also decryption of messages encrypted within its respective public key, the private key is private and must be kept secret as access to private key means access to every message that has has been encrypted with with the public key derived from the private key. And the public key is derived from the private key using a mathematical formula and it differs such in a way that, the public key is visible to everyone and can be put out to be used to encrypt messages that only the private key which is derived from can decrypt and access thereby used to confirm digital signature.

  2. Public key can be used for a. digital signature and b. encryption.

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#4924
  1. A private key is generated by a computer system. What it generates is a random string of numbers. The private key.

With private keys, one can generate public keys.

A private key is only known and seen by the owner/holder of the sensitive information.

  1. First use case would be for encryption. They can use a public key to encrypt information.
    Secondly the private key can be used to give one access to funds sent using a public key which was originally formulated using the private key.
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#4925

  1. Private key is a key your computer generates in other to encrypt an information and it shouldn’t be shared with anyone, Public key is also a key your computer generates from the Private key, this you can share with people. when someone send you a message , they can encrypt it using your public key but you’ll decrypt it using your private key.

  2. Encryption and digital signatures.

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#4926
  1. Describe the concept of public and private key with your own words.

A private key is linked to a generated public key to encrypt a transaction or message. This is a one way function so that public keys can’t be linked to private keys. However, you can do the reverse.

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

Digital signature
Encryption

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#4927

Answer 1 - Public Key is similar to bank account number so that other people can transfer money into my bank account, however Private key is like user name and password for my bank account which I shall only use to transfer money to others

Answer 2 -

Use Case 1 - Dating Site - I can send a request to my match using public key of other person

Use Case 2 - Gaming Site - I can send gift / coupons etc using public key of other person

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