Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#4627
  1. Describe the concept of public and private key with your own words. Public keys are open or shared code that tell encrypted data where to be sent. Privates keys are the mechanism to open that encrypted data.
  2. What 2 use-cases can public key cryptography be used for?
  3. Encryption 2. Digital Signatures
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#4628

1- private key is a random number generated by computer. Its used to create a public key which can be shared with everyone. they are used to encrypt the messages

2 - digital identity and encryption

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#4629
  1. Public keys can only be generated from private keys. It is a one way street.
  2. It is used to encrypt messages and send digital signatures from your public keys so the can verify that it came from the address it is said to be from
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#4630

  1. Describe the concept of public and private key with your own words.
    Private key is a randomly generated set of numbers. From the private key comes the public key.
    Private key is for your safe-keeping, whereas public key is for the public to view it.
    Private key is used to decrypt an encrypted message sent by public key.
    Private key is used to sign digitally to prove that the message belongs to the sender.

  2. What 2 use-cases can public key cryptography be used for?
    Digital wallet address that we send to our friends.
    It can also be used to encrypt a message.

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#4631

you mean encryption, right😊

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#4632
  1. Private key is a random number generated from a high order of magnitude by a computer. The private key gives you a public key that everyone can view. The private key is used to have access the funds or messages. Through the signature of private key and viewing the public key you can confirm the message came from such person. When sending a message you use your private key to sign verifying that its comes from you.
  2. Two use cases are encryption and digital signature.
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#4634

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

Correct me if I am wrong. I simulate " Private and Public key’ concept with Net Banking where you have an account number as public key which we share publicly without any fear to send and receive funds in our bank account and we have a ‘password’ to manage all the account related activities which we never disclose to anybody. Although, in case of net banking, we don’t have any correlation between our bank account number and the password as we have in private key and public key, where public key is derived from the randomly generated private key. So what I understand, Blockchain is acting as an independent banking system where our public key act as our account number and private key as our password.

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

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#4635

  1. Describe the concept of public and private key with your own words.
    Private and public keys are used to encrypt messages between different users. Important is that one can only access their received messages in the public address by entering the private key, the other way around is not possible. This makes it impossible for stranger to read your messages/transaction without your private key

  2. What 2 use-cases can public key cryptography be used for?
    a) encryption
    b) digital signature

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#4636
  1. Describe the concept of public and private key with your own words.
    Private key is generated by computer algoritam, it’s long random number and we keep it secret (like e-mail password) from that key, Public key( that is like our e-mail address) is derived with one way function and that key anybody can use to send us encrypted massage, which only our private key can make readable for us (decrypt).
    In Bitcoin we have Wallet where is private and public key pair generated and from public key bitcoin address is hashed. When we send bitcoin to Bitcoin address we us private key to digitally sign transaction. That signature is verified if can be paired with our public key. They are unique and mathematically connected (private and public key). It is not possible to derive private key from Bitcoin address.
  2. What 2 use-cases can public key cryptography be used for?
    For encryption and digital signature
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#4637

  1. the private key is random number that creates the public key. The private key is also used as a ‘‘tool’’ to decrypt the public key, but not the other way around, if the information is encrypted. The private key is also used as a digital signature when sending a message via a public key. So the public key derives from the private key

  2. it is used to receive encrypted messages or funds in this bitcoin ecosystem, and to verify with the signature and the private key that it is original.

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#4638

  1. With a public key any one can access your message but for Private key your messages or information is encrypted nobody can access it.

  2. encryption messages and Digital signature.

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#4639

1.Private Key is like a bank account pin, which could be used to “lock” and “unlock” information. Whereas, public key is like your bank account number which we can share so that people can transfer funds to us

  1. The 2 use cases of Public and private cryptography are Encryption and Digital Signatures. Bitcoin implements digital signatures in their system
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#4640

  1. A Private key is generated by a person which can then generates a public key. The public key is shared and can be used to encrypt data that the holder of private key can decrypt.

  2. Digital signature and for sending a messages

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#4641
  1. With the public key we encrypt information and this encrypted information will be decrypted with the private key.
  2. Encryption and digital signature.
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#4642

  1. Describe the concept of public and private key with your own words.
    A Private Key is a randomly generated number that in practice is unique for each user. Private Keys are used for identification: the one in posession of the Private Key number can sign transactions as a way to confirm their identity or encrypt information. A Public Key is derived from the Private Key, and its used to verify its signature/decrypt the information sent. Its important to note that the relation between the private and public keys is asimmetrical: there is no way to go from the public key to the private key.

  2. What 2 use-cases can public key cryptography be used for?
    A) Encryption of messages.
    B) Digital Signatures.

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#4643

1. Describe the concept of public and private keys with your own words.
The public key is a derivative of the private key and can be shared with those with whom you wish to interact. The private key is superior and is used to generate public keys and reveal the encrypted content.

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

  1. Encryption
  2. Digital Signatures
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#4644
  1. The public key can be used to encrypt but the private key is needed to decrypt the message.
  2. Encryption and signature
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#4645
  1. Describe the concept of public and private key with your own words.

Asymmetric encryption where the public key is used to encrypt, receive transactions, and shared publicly while the private key is used to decrypt or sign transactions.

  1. What 2 use-cases can public key cryptography be used for?
  • Encrypt data
  • Receive data
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#4646

Keys can’t really receive any data, but you can use them for digital signatures. :wink:

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#4647

Question: I know that I shouldn’t share my private keys with anyone that I don’t want to have access to all my funds. That would be easy for me to do because I don’t even know where to find my private key in my metamask wallet for example. Can you tell me where my private key is in my metamask wallet and ledger wallet so I can know not to give that particular number away on accident and also for learning and curiosity sake. :nerd_face: