Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#5148

  1. Describe the concept of public and private key with your own words.
    Private key is personal and public key is generated from private key. It’s a one way decryption, as you can retrieve public key only if you have private key.
    Public key is shareable wit everyone, as private key has to keep secret.

  2. What 2 use-cases can public key cryptography be used for?
    Encryption message between two parties, while sharing public key. The target will be able to decrypt the message, thanks to public key and with his private key.
    Digital Signature is the second use case : where the private key is used to sign a message, in sort of the receiver is able to decrypt the message with this signature, in addition to the public key of the sender.

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#5149
  1. Private key generates unique codes that can then be used as your identification. Public key on the other hand, derives from the private key and anyone can see this, the public can see this.
  2. Encryption - where one transaction can be made through secret codes/public keys but the only one who can decrypt it is the one holding the private key.
    Digital Signatures - Is the one mostly used on cryptocurrency at the moment. This is where you no longer need to use encryption to transact, and sign your message from your private key instead. In simplest word, for identification.
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#5150
  1. a computer generated number that coincides with another random generated number making them a key pair used mostly in communication.
  2. the two major use cases are Encryption and digital signatures.
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#5151
  1. Describe the concept of public and private key with your own words.
    Public Key anyone can see it and use it, Private Key is for sender only. Public key is generated from private key. Private key is unique, none can ever guess it.
  2. What 2 use-cases can public key cryptography be used for?
    Encryption and Digital Signature.
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#5152

  1. private key can generate public key. Public key is available publicly and can be used by the sender to encrypt the data. Then this encrypted data is sent via network. If the receiver owns the private key then they can decrypt it

  2. To create encryption and to create digital signature

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#5153
  1. Describe the concept of public and private key with your own words.
    The private Key is the user’s secret that allows to an user to sign a transaction or decrypt a message
    A public key is distributed to everyone to verify a fingerprint (Person integrity) or encrypt a message
  2. What 2 use-cases can public key cryptography be used for?
    Digital sign
    Communication encryption
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#5154
  1. Describe the concept of public and private key with your own words.

Private key is a alphanumeric string that is unique to the creator, which enables encryption and digital signatures. To encrypt, the private key is used to generate a public key (a string that is made public) which allows the sender to encrypt the message that can only be decrypted using the private key. Private key is also used a digital signature, which verifies the identity of the sender through corresponding the sender’s public key and signature to sender’s private key.

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

Encryption and digital signatures (Wallets and Bitcoin transactions)

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#5155
  1. Describe the concept of public and private key with your own words.

Public key can see anyone. Public key is generated from the Private key. The private key generates unique code that can be used as identification.

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

encryption and digital signatures

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#5156

Homework on Public and Private Keys - Questions

  1. Describe the concept of public and private key with your own words.
    A private key is a randomly generated number that is so long that the universe will collapse before someone is possibly able to guess it. A public key is an address generated from the private key used for functions on the blockchain that are public such are receiving funds or sending them.

  2. What 2 use-cases can public key cryptography be used for?
    Public keys can be used for authorizing aswell as encrypting/decrypting but can only be operated with a private key

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#5157

Hi everyone,

  1. The private key is what I keep secret. The public key is derived from the private key and everyone can see it. While the public key is derived from the private key, there is no way to derive the private key from the public key. If I want to send a message only you can read, I can encrypt a message with your public key, that is a way to say “this message is for you”, it can be “unlocked” only from the private key which corresponds to your public key. Then you can use your private key, which you are the only one to know, to open it. We could communicate one with each other without having to share anything private, it’s not like I send you a word document telling you “hey here is the password to open it but don’t share it with anyone else”.
  2. Encryption (as explained above) and digital signatures
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#5158

The basic concept is the public and private key are a pair and messages can be received through your public key and can be decrypted with your private key. The public key is your “letterbox” and private key is your “front door key”.

Use cases are encryption for messages,
and digital signatures for cryptocurrency. The digital sigs serve as a “lock on your letterbox”.

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#5159

  1. The concept of the Public and Private keys is like a relationship where one depends on the other. The Public Key is derived from the Private Key. This is a one way function and you cannot figure out the private key from the public key. The Public key can be shared anywhere but you must keep the private key a secret.

  2. 2 use cases include email and cryptocurrency.

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#5160

  1. The Public Key is generated from the Private Key. There is no way of figuring out what the private key is with just the public key.

  2. Encrypt and Sign

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#5161

  1. Describe the concept of public and private key with your own words.
    Public key is used to encrypt datas, The private keys decrypts it.

  2. What 2 use-cases can public key cryptography be used for?
    i. Authentication
    ii. Bitcoin
    iii. SSH

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#5162

You can also use to encrypt your message when you are using an open or unsecured network.

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#5163
  1. the private key is my digital identity and integrity while the public key is the gateway to verify my digital identity.
  2. to encript messages and to sign transactions.
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#5164
  1. Describe the concept of public and private key with your own words.
    A public key functions as an address that can be shared widely for users to send messages or transactions to that address; it is derived from the owner’s private key via a one-way function so that the private key remains private only to the owner to retrieve the messages, or use their key for a digital signature proving authenticity/ identity verification.
  2. What 2 use-cases can public key cryptography be used for?
    a) public key cryptography can be used for sending and receiving encrypted messages
    b) private key can be used for digital signature/authentication
2 Likes
#5165

  1. Describe the concept of public and private key with your own words.
    It’s a mathematic method of transmitting encrypted data securely. The message receiver (Bob) uses their private key to generate a public key (shared freely with the public), and then a message sender (Alice) uses that public key to encrypt a message. The message can only be decrypted by the private key (Bob). If Bob wishes to send a message to Alice, he’ll have to obtain her public key. Thus, a single pair of keys allow only for data to transmitted securely to the pair owner.

  2. What 2 use-cases can public key cryptography be used for?
    Message encryption and digital signatures.

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#5166

  1. public key is more or less your adress where everyone can see and can send you bitcoin
    the private key generates the public key and is not calculatable viseversa from the public key and is needed to sing transactions

  2. To have a adress that people can send somone a message, coins or other data. and to enrypt the data and make it for the other person possible to open the message if he has the private key related to the public key the message is send to

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#5167
  1. Describe the concept of public and private key with your own words.
    They provide the way of securing messages through public networks with spectators.
  2. What 2 use-cases can public key cryptography be used for?
    Encoding and signature
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