Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#4948

  1. The concept of public and private keys in cryptography = With a crypto wallet, your computer generates a (random number) private key, from which a public key is also generated. You use your public key openly - this is the address you use to send and receive crypto. Your private key is kept a secret by you, because anyone with your private key can unlock funds sent to your public key. Your private key signs transactions sent from you public key, and approves transactions sent to you public key.

  2. Two use cases for public key cryptography are encryption and digital signatures

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#4949
  1. The public key is used to encrypt sensitive information and the private key decrypts the information that was encrypted with the use of the public key.
  2. The 2 use cases are encryption and digital signatures.Digital signatures verify who sent the message since the private key derives the public key which creates the bitcoin address. You send bitcoin using your private key and receive bitcoin to your bitcoin address.Cryptography and the use of public and private keys solves the security issue when we use the internet.
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#4950
  1. The public key is used to facilitate exchange between private keys… as such public keys are visible to the public and private keys are unseen by the public. Basically public keys allow for ease of communication by way of encryption, while private keys maintain security of decryption.
  2. Use case #1 for Public Key cryptography is encryption of information and use case #2 is proof of digital signature.
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#4951

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

  • With the concept of using private and public keys, we use a publicly available number to encrypt messages sent to someone or to verify a message received from someone. The public key derives from a randomly generated large number called the private key.

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

  • Encryption
  • Verification of identities and integrity of data
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#4952

1. Describe the concept of public and private key with your own words.
Your private key belongs to you, is secret, and is never exposed to others. Your public key is derived from your private key, and the private key can never be recomputed from the public key.

2. What 2 use-cases can public key cryptography be used for?
Public key cryptography can be used for encryption and signing.

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#4953
  1. The private and public keys allow people to send secret messages over an open or insecure network. The public key allows people to send you an encrypted message, that can only be opened using the corresponding private key.
  2. a) Encryption. b) Digital Signatures
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#4954
  1. Describe the concept of public and private key with your own words.

A public and private key are used for secure communication and transactions. The private key is a randomly generated number. The public key is derived from the private key, and can be shared in public spaces that are visible to anyone. In secure messaging, someone can use another person’s public key to send a secure message that said person can only decrypt. The message can only be decrypted by the owner of the private key from which the public key was derived.

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

Secure signing in messaging as well as cryptocurrency transactions are two use cases for public key cryptography.

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#4955

Both of these use digital signatures to function. The second use case would be encryption. :slight_smile:

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#4956

Yes…you are correct!

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#4957
  1. Describe the concept of public and private key with your own words.

A public key is a line of code/letters/numbers that can be shared with the public, hence a public key.

The private key is the line of code/numbers/letters that the public key was derived from. That key must be kept secret, since everybody who has it can decrypt what you want to keep secret. Meaning they can read messages that you encrypted, and they can create your digital signature so the network acts on their behalf. Meaning sending coins from your wallet.

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

Encrypt messages so only the intended people can read it when other people is listening on the network

Create a digital signature that proves the identity of the sender

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#4958
  1. Describe the concept of public and private key with your own words.
    Private key is unique to one user only, it then generates a public key that can be viewed by open access internet
  2. What 2 use-cases can public key cryptography be used for?
    Encryption and Digital Signatures
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#4959
  1. Describe the concept of the public and private keys in your own words.
  • Public key refers to the key or combination of various different characters that can be readily seen by the public. Whereas, private key refers to the combination of numbers that is used to perform any action like signing message/transaction, decrypting the messages sent to the public key, and verifying the ownership of the public key.
  1. What 2 use-cases can public-key cryptography be used for?
  • Sending any message/transaction in encrypted form through the use of the public key.
  • Verification of transaction through the use of digital signature and public key.
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#4960

  1. A private key is a random generated number of a certain length. The public key is derived from that public key in a hash form (one-way only)
    The public key can be used to check/confirm if the message is really from the person that has the private key.

  2. To sign messages, and to create unique wallets.

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#4961

1.A private key is a random generated number from which a public key can be made. You can get the public key from the private key but not the other way around.

2.This can be used to encript messages, someone uses the public key to encrypt a message and the person with the private key can decyfer that message.
It can also be used as a digital signature. When you sign with the private key it can be checked by the receiver by using the public key if it’s signed correct.

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#4962

  1. The concept of Public key & Private key is that in order to encrypt information so that preying eyes cant view the contents of a transmission, One must use a method of encryption. keys allow a user to share information privately with a third party.

  2. encryption of data & Digital Signatures

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#4963 
1. Private key is a large randomly generated number.  Gives the owner the ability to send messages (funds). It generates a public key - an address that is made public for receiving messages from others
2.Can be used to  encrypt the messages
   Can be used to  digitally sign
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#4964
  1. The private key it’s only know by ypu, from it a public key it’s generated to validate all the transactions. You sign the transaction wit the private key and the receptor can validae the message with the public key and the sign, but never can know the private key because of it’s mathematically imposible do that.
  2. Burofax, money sent, critical orders(govern)…
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#4965

  1. The concept of public and private key is that your private key is like a solid foundation that’s underground and is the thing that holds everything together. No one can see it and no one needs to see it. From your PRIVATE key (foundation) you get a public key which is still unique, but it’s safe to allow the world to see this key. It’s how people are able to identify you. All public interaction happens using the public key, but everything is verified by the public keys connection to the private key.

  2. The two major use cases are ENCRYPTION and DIGITAL SIGNATURES

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#4966

  1. a) A Private key is a hashed string of characters that is generated by my wallet and is used to created a public key, as well as crypto addresses, and digital signatures. No one can see is able to see the private key
    b) A Public key is a unique hashed string of characters that is generated by a unique private key. This key is publicly visible on the blockchain.

  2. The 2 use cases of a public key are in message encryption and in digital signatures.

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#4967
  1. private key is known by creator only and can be used for digital signature. public key is available to entire network and can be used to verify sender.
  2. for sending messages and verifying sender.
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