Homework on Public and Private Keys - Questions

  1. Public keys are something anyone can use to identify a person and send them messages, and private keys are signatures to verify that the correct person is contacting you and passwords to unlock messages encrypted by your public key
  2. Sending and receiving encrypted messages, and verifying that a message came from.the correct person
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  1. the public key is used to encrypt or act as a signatory function for data, while the private key is private and is used to decrypt data

  2. public key cryptography is used for encryption and digital signatures.

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  1. public key is sharable and it’s used to encrypt a message, private key is only accessible for you and it’s used to decrypt a message.
  2. encryption and digital signature
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1 The private key is my personal key used to decrypt data, the public key is the key, generated from the private key, I share and is use to encrypt data

2 use-cases public key cryptography can be used for are encryption and digital signatures

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

A private key is a randomly generated large number which is then mathematically processed in to a public key. The private key cannot be derived from the public key, but anything encrypted by the public key can only be decrypted by the private key.

  1. What 2 use-cases can public key cryptography be used for?
  1. messages secure transactions 2) funds secure transactions
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  1. A private key is a huge random number generated by your computer then the public key is generated by using a 1 way function on the private key.

  2. the 2 main uses for this is encryption and digital signatures

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  1. A Private and Public keys are used for encryption of transactions and messages and also for digital signatures. The Private key is created by the person receiving messages or transactions and this key is kept secret. With this Private key, a Public key is generated that can be shared with the world. This then allows anyone to send a message or transaction to you, which can then only be decrypted by your Private Key. Bitcoin now takes this one step further and requires you to set up a Bitcoin address from your Public key.

  2. Encryption and Digital Signatures

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  1. Describe the concept of public and private key with your own words.
    *Private is is random number generated by computer, and when we have private key we can generate public key, but not wise versa. Public key and private key are used to encrypt and decrypt messages. Private key is important for ownership rights, which allows us to sign transaction or decrypt encrypted message. Public key functions as a proof visible for everyone that we are the private key owners, or to encrypt the message.

  2. What 2 use-cases can public key cryptography be used for?
    *a/ encryption (encrypting messages), b/ digital signature (used in Bitcoin) *

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

private key is a random number which is generated by your computer. And the public key is generated by the private key. They are a pair. They always come in two.

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

Encryption And digital signature (BTC transactions)

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1.The ā€œPrivateā€ key is a huge random number calculated by your computer. The private key is the used to generate a ā€œPublicā€ key. The public key is displayed by the user, so anyone wishing to communicate with the user encrypts their message with the public key which then becomes an apparently random sequence of bits that even the original sender can’t de-crypt to change. They have to send a new message. The receiver then uses his private key to de-crypt the message.

2.Encryption of messages & Digital Signatures authorising transactions are the two main use cases of Public/Private cryptography.

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  1. A public key is just that, it is shared publicly. It is used to send encrypted information from one party to another. A private key is not shared with any other person. A private key is used to privately/securely view or receive the information that has been sent from the aforementioned party location.
  2. Public key cryptography can be used to send confidential/sensitive information from one party to another (email or business information for example). It can also be used to send cryptocurrency securely.
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  1. Describe the concept of public and private key with your own words.
    A: Public & Private keys are large numbers generated for the purpose of sending the ā€œmessageā€. Private key generates the Public key and not the other way around. Public key is visible to everyone, while Private key shouldn’t be shared and kept secret. Private key signs the message while the Public Key verifies the signature.

  2. What 2 use-cases can public key cryptography be used for?
    A: Used as an address or to verify digital signature.

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  1. The concept is that the private key (created by a random number) will generate the public key through a formula. Anyone wo wants to sent you for example a message that should not be read by others he uses your public key. You can decrypt the message with your private key. So public key encrypts and the public will decrypt.

  2. The 2 use cases are encryption and digital signature (indentify, integrity, BTC transactions).

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Addresses are just hashes of public keys. The other use case for PK cryptography is encryption. :slight_smile:

  1. Describe the concept of public and private key with your own words.
    A public key is like your address/location on the Internet (Anyone can find you and it is there for all to see ) however a Private key means anyone who wishes to communicate with you will need to encrypt the message so it is only visible to you ( and not everyone else) . This is done with a Private Key.

  2. What 2 use-cases can public key cryptography be use for.
    use case 1- to generate a private key for sending encrypted messages.
    use case 2- to verify the authenticity of an encrypted message with a digital signature

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  1. Describe the concept of public and private key with your own words.
    A private key produces a random secret number that only the owner can see - ie a person ledger wallet. A public key is visible to everyone on the internet when you share your information with the public, ie blog, Twitter, social media platforms. The private key generates a public code so transactions and messages can be sent peer to peer. The private key holds a specific code or a digital signature this shows that the person making the transaction is legit.

  2. What 2 use-cases can public-key cryptography be used for?
    Encryption and Digital signatures to send and receive crypto payments from peer to peer transactions. ie sending Bitcon to a cold store wallet.

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  1. A private key is a randomly generated series of numbers that can be used to generate a public key, which is another set of numbers. The public key can be used to encrypt messages that the private key can decrypt.

  2. Public Keys can be used to encrypt messages sent from one person to another and can be used to send digital signatures that can be verified by the user’s private key.

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  1. The public key is used to enrypt 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. Encryption makes the message unreadable for anyone that don’t know the private key.

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  1. Private is use to decrypt a message whcih was encrypted by the public key
  2. in earlier bitcoin days , public keys served as bitcoin address and also it can use to encrypted emails/messages
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  1. Describe the concept of public and private key with your own words.

Private key is a random number and a public key is generated using a private key. Public key is visible to everyone. Any communication/interaction happens with public key and can be decrypted using private key

  1. What 2 use-cases can public key cryptography be used for?
    Sending encrypted messages
    Identifying the senders digitally
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