Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#3222

Public keys are essentially a digital address generated by the private key that money or messages can be sent to.
Private keys is more of a digital signature that should be kept safe.

Digital signatures and Encryption.

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#3223
  1. private key is generated from a random number the public key is derived from the private key through a function
  2. encryption, sender uses public key of the receiver with a message
    digital signature to confirm origin on the message
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#3224

Private key is not a digital signature in itself. You can digitally sign messages with a private key that others can verify with the corresponding public key. :slight_smile:

That is more of a property of PK cryptography. Sending/receiving funds utilize digital signatures and the other use case is encryption. :slight_smile:

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#3225

  1. A Private key is a random number generated. Private key is only for the user to see and know and must be kept secret. A public key is derived from a Private key, and this is for all to see. Public and private keys are used for encryption, digital signatures and secure messages.

  1. Public keys can be used for sending encrypted messages.
  2. Public keys can be used for digital signatures, verifying that the sender is actually you.
2 Likes
#3226

Hey, thanks a lot for the corrections and feedback. I think I have it clearer now.

  1. So the private key is just a random and unique number given by the computer. It can used to digitally sign every message/transaction and is verifiable by others with the corresponding public key.

  2. What 2 use-cases can public key cryptography be used for?
    It can be shared online without risking the private key.
    It can be used for encryption.

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#3227

Excellent! :raised_hands: except the public key has to be shared in any case so its not really a use case.

Digital signatures are one use case (very important because they are heavily used in cryptocurrencies) and the other is encryption. :slight_smile:

1 Like
#3228

Thanks a lot for helping me , I really appreciate it :slight_smile:

#3229
  1. Computer generates random numbers called private key: only you can see it and its secret. Public key is generated trough special formula from private key.
  2. Encryption: encrypting messages with public key and decrypting it with private key.
    Digital signatures: verifying signatures. Private key signs the transaction, you can verify it by public key and signature.
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#3230
  1. Describe the concept of public and private key with your own words.

Your private key is generated randomly and it only belonges to you, always!
With the private key you create a public key that is shared publically. This key can be used to send messages, which you have to sign with your private key, for others to identify that it actually came from you.

  1. What 2 use-cases can public key cryptography be used for?
  1. Encryption, to send encrypted messages.
  2. Digital signatures, to confirm identity.
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#3231

  • Describe the concept of public and private key with your own words.
    Public key: The address that you can openly share
    Private key: The address that you should never share

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

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#3232
  1. Describe the concept of public and private key with your own words.
  • Public key i generated from private key, I use my private key to encrypt message, receiver use my public key to decrypt it .
  1. What 2 use-cases can public key cryptography be used for?
  • Encryption and digital signature
1 Like
#3233

  1. Your private Key is PRIVATE. It’s used to generate your public Key, wich you share. (in BTC you usually only share your BTC Adress which is generated witch your public key)
    With your private Key you can sign any messages or transactions you receive. Its verifiable by counterparty using your public key

  2. Encryption and digital signatures

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#3234

  • Describe the concept of public and private key with your own words.
    These are used to verify the identity of those in a transaction. Private and public keys are unique to and individual. Public keys are generated from private keys. Public keys are visible to everyone. This is what someone uses to send a message to a specific individual. However, the recipient can only view the message by unlocking it with a private key. Only the recipient would have the ability to access the message through the private key.

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

1 Like
#3235

Questions

  1. Describe the concept of public and private keys? Private keys are your own keys and are used for encryption and for identification. You use your private key and the public key of the person you want to communicate with to encrypt a message and send it over public rails. The only way the message can be unencrypted is through the use of the endusers private key.

  2. Public key cryptography is used in digital signatures and encryption.

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#3236 
1. Describe the concept of public and private key with your own words.
	○ Random number generated by your computer is your private key 
	○ The private key is then run thru a formula (one-way function) to create a public key (derived from Private key)
	
2. What 2 use-cases can public key cryptography be used for?
	○ Public key cryptography use cases-
		○ For encryption
		○ Digital signatures
			§ Identify yourself
			§ Ensure integrity of message
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#3237

  1. Describe the concept of public and private key with your own words.
    Public keys are generated by private keys to encrypt information. Only the Private key holder can decrypt this.

  2. What 2 use-cases can public key cryptography be used for?
    Public keys can send encrypted messages and verify the sender with a digital signature.

1 Like
#3238
  1. Describe the concept of public and private key with your own words.
    Private key is a random large number generated by a computer that represent the owenership of a wallet or a message, a publi key is derive from the private key and it is the representation of that private key, in bitcoin terms, the private key is the probe of ownership and the public key would allow other people to send coins to my private wallet.
  2. What 2 use-cases can public key cryptography be used for?
    Send a encrypted message and digital signature
1 Like
#3239

1.) With the public key is used to encrypt data. while the Private key is used as a Digital signature to verify or open encrypted data.
2.)opening encrypted data, signing for sending and receiving transactions of bit coin.

1 Like
#3240

[quote=“ivan, post:1, topic:8431, full:true”]
Homework on Public and Private Keys - Questions

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

Private Keys and Public Keys terms are used in encryption and decryption. These keys are used to encrypt/decrypt sensitive information.
The public key is shared on internet and can be seen by everyone, the public key is derived from the private key.
The private key is a random number , needs to be kept secret, through a special formula the private key generates a public key.

  1. What 2 use-cases can public key cryptography be used for?
    Encryption and digital signature
2 Likes
#3241

thank you for the feed back!!