Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#1030

1 peer to peer one way security
2 currency signing and PGP encryption messages

#1031

  1. Private key is a random number generated by your computer. The public key is derived from the private key and in most cases handed to others (made public). You can not derive the private key from the public one, only the other way around.

  2. You can encrypt messages with a public key that can only be reed by the owner of corresponding private key and you can sign messages with your private key to ensure receiving part that the message is legit and coming from you

#1032

  1. The concept of public key is to verified transaction from your private key

  2. Digital signatures and Encryption

#1033

The concept is a one way direction (non reversible) to create a very safe way to transport a message from 1 person to another

#1034

1. Describe the concept of public and private key with your own words.
a. The concept and implementation of public and private key cryptography solves two fundamental problems in cryptography.
a1. Being able to verify that I am the one sending a message to someone else and vice versa -> Verification of identity
a2. Not having to share the secret encryption key between participants to communicate in a secure fashion -> Security

Thus, for public and private key cryptography every participant needs a public/private pair of keys.

The private key is kept secret and allows to

  1. verify the identity of the owner
  2. decrypt a message sent by someone using the owner’s public key for encryption

The public key can be sent or stored on an open channel, for everyone to see. It is used to

  1. encrypt a message to be sent to the owner of the public key
  2. verify the signature sent with a message from the owner of the public key

2. What 2 use-cases can public key cryptography be used for?
b. Encryption and Digital Signatures to warrant the integrity of identity

#1035
  1. Private key is a random number which can create a paired public key with a special formula. A public key can be though of as an outcome of a hash function where no one can derive the input from the output, so no one can determine what your private key is from looking at your public key.
  2. Two use cases for cryptography are 1) encryption 2) digital signatures.
#1036
  • Describe the concept of the public and private key with your own words.

The private key is required to keep the information safe from the public eye. You can go from private to public, but can’t do another way around.

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

The public key cryptography can be used for encryption of the information and for digital signatures to assure that it is the right person performing an action.

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#1037

Describe the concept of public and private key with your own words
Private key is a personal string of numbers generated by computer in order to create a public key (reverse process is impossible – it’s a one way function).
Public key (address you share) used to encrypt the messages sent between participants via unsecured network. Whoever holds the private key is able to decode the message
What 2 use-cases can public key cryptography be used for?
a) Encryption
b) Digital signature

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#1038

  1. Describe the concept of public and private key with your own words.
    A private key is a secret, personally generated key that only you have access to. This key can be used to sign messages/transactions. The public key is derived from the private key and can be used to encrypt messages that the private key can open. The public key can also be used to compare transactions/messages with private key of source for authenticity.

  2. What 2 use-cases can public key cryptography be used for?
    Encryption and digital signing authentication/identity management.

#1039
  1. Describe the concept of public and private key with your own words.
    Public key is an address that is generated from the private key. Public key is used to receive transactions and it is usually encrypted. The private key is a key that can decry-pt the address received from the public key. It can also be used to sign a transaction by using digital signatures.
  2. What 2 use-cases can public key cryptography be used for?
    Send a message or send funds. Also, it can be used for encryption and digital signatures.
#1040

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

A private key is an individual key that opens private “access” to messages, currencies etc.

A public key is derived from a private key that allows people to send messages, currencies etc. that only the holder of the private key can access

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

Encryption & Digital Signatures

#1041

  1. Private key generates the public key. Public key is public and used to transmit messages, but only private key can retrieve messages. Private key can be used to identify and sign.

  2. (1) public address on cryptocurrency platform which receives funds. (2) Public key shared on twitter/blog.

#1042

Describe the concept of public and private key with your own words.
A private key is a random number from which we derive the public key. This allows us to send secure messages to the intended party
What 2 use-cases can public key cryptography be used for?
Receiving/sending BTC or sending/receiving encrypted emails

#1043

  1. Your private key is a randomly generated code on your computer which isn’t shared, however from this your wallet generates a public key which is your wallet address.

  2. generating an address from which you can send and receive cryptocurrency, digitally signing files or documents to ensure their authenticity (such as the messages calling Craight wright a liar and a fraud, signed by OG satoshi addresses)

#1044

Private key can be thought of as your signature in a check and your public key can be thought of your account number of course you don’t want people to know your account number but without your signature it is an invalid transaction if someone was trying to forfeit it.
Of course it is really easy to forge that signature but here using the private key is not.

  1. Public keys can be used for encrypting data files and or verifying digital signatures
#1045

  1. Private Key - random number generated by a computer that should be held safely by the interested party and which can be used to encrypt or digitally sign data.
    Public Key - random number derived from the private key which can be made public and refers to the private key in case someone wishes to send an encrypted document to the holder of that public key.

  2. Can be used for encryption and digital signatures

#1046

  1. Describe the concept of public and private key with your own words.
    The public key is what the name suggests- Public. It is available to everyone via a publicly accessible
    location. In comparison, a private key should remain confidential and secure to the respective owner.

  2. What 2 use-cases can public key cryptography be used for?
    Cryptography can be used for both data encryption and the verification of digital signatures.

#1047
  1. Describe the concept of public and private key with your own words. - A private key is a secret large number generated by a computer. This private key is used to decrypt any messages sent to you that are encrypted with your public key’s number. The public key is created using a one-way function and inputting your private key to output your public key. Public keys are safer to put on a public network for people to see.
  2. What 2 use-cases can public key cryptography be used for? - It can be used to encrypt a message and it can be used for digital signatures to confirm transactions on the block chain.
#1048

Public and private keys are core security feature of Bitcoin due to its one way or trap-door function.
Public key can be shares with other members on networks. It is easily generated from private key , but difficult to deduce the private key, even knowing the input and the Public key.

Public key is used for encrypting information and secure it from anyone but the intended destination, when message go through open platform.
The second use is for the digital signature. The sender will sign the message using his or her private key. The intended receiver can verify that this information is from the correct sender, by using the public key of the sender.

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#1049

  1. Public and private keys are used as an encryption method for signing messages and transactions. Public keys can be generated from private keys, but not vice versa. Through a digital signature the source of a message can be validated since the private key generates a unique signature.

  2. Signing messages and encryption

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