Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#970
  1. Public keys are a string of randomly generated numbers derived from and linked to a private key They are available for the world to see. Public keys however, although linked to private keys, are not able to access it. Private keys are also randomly generated however, they are secure and only the owner of the private key can access encrypted information from it’s linked public key.
  2. Public key cryptography can be used for both data encryption, as well as digital signatures.
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#971

  1. A private key is used to sign and send a transaction. Only one person has access to a private key; it is not available to the public. However, the private key generates a public key that other bitcoin users can access. A public key eventually gives a user of bitcoin a bitcoin address that he/she can use to receive and send transactions.

  2. Public key cryptography can be used for two use cases: encryption and digital signatures. Digital signatures is the more common use in bitcoin.

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#972
  1. Describe the concept of public and private key with your own words.

Private key is randomly generated. The Public key is derived from the private key.
This 2 keys are used for security and identification.

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

A) Encryption of messages
B) Digital signature of transaction

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#973

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

Private key is a -secret and safe- key, a random number generated by the computer. It is used an unique key for you, which with you can generate a public key. Only in that way, never viceversa. That’s why you can encrypt a transaction/message with the public key and decrypt with the private (only you, of course).

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

Encryption and Digital signatures.

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#974

Homework on Public and Private Keys - Questions

  1. Describe the concept of public and private key with your own words.
  2. What 2 use-cases can public key cryptography be used for?

The private key is a random, computer generated number which is used to then generate the public key. The public key is shared with those who wish to send messages to the owner of the private key, encrypting the message so that only the owner of the private key may decode the message.

Public key cryptography may be used to send encrypted messages or to confirm that a message has been signed by the owner of the private/public key pair.

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#975

  1. Describe the concept of public and private key with your own words.
    Your public key is like your email address. Your private key is the password to your email account.

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

Crypto wallets and as a digital signature.

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#976

  1. A public key can be derived from a private key and can be use to encrypt messages to ensure privacy and that it gets to the intended person. The messages can only be decrypted by the private key. In the case of cryptocurrency the private key is used to sign and verify messages or transactions from cryptocurrency wallets

  2. encryption and digital signatures

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#977

1- A public key is a cryptographic key which encrypts a message when sending through public channels where the recipient is the only one who can decrypt it with the recipient’s private key.

A private key is the digital signature used to verify a particular message. The owner of the private key is the only one that knows the private key.

2- Encryption and Digital Signatures

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#978

Homework on Public and Private Keys - Questions

  1. Describe the concept of public and private key with your own words.
    public key a key generated from the private key that can be seen by the world. This is used for the receiver to verify that the transaction came from you.

private key a random generated number that gives access to user to send funds. Anyone who has this private key may take all of the funds from the wallet. This should not be shared with anyone but the user and must be kept somewhere in a hidden place noone knows about.

  1. What 2 use-cases can public key…?
    Two use cases for public key cryptography are to encrypt messages and to create a digital signature through the private key.
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#979

Public key is generated by the private key.in order to access information private is needed where as to send information public key is required. Private key can also be used to sign a message proving that the message was indeed sent from the blockchain address corresponding to the public key.

*To send or receive messages (Encryption)
*A digital identity (Digital signature)

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#980
  1. Describe the concept of public and private key with your own words

Public key is a cryptographic code derived from private key using a sophisticated algorithm.

Private key is an extremely large and highly random number or a series of alphanumeric characters.

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

Encryption and digital signatures.

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#981

  1. You create a private key to generate a public, open key. You need your private key to decrypt the data encrypted with the public key. The public key is depending on the private key.

  2. Encrypt messages and verify signatures.

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#982
  1. it is a concept where a pair of keys is generated. the private key, a randomly generated number, is held as a secret by the owner who generated it, and the public key, which is derived from the private key, is distributed publicly for everyone to know. 2. They work in conjunction and are used to:
    a) encrypt and decrypt communications and prevent eavesdroppers to understand the message sent
    b) sign a message to prove the identity of the sender to participants of a network
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#983

The private key is a randomly generated number, which is kept secret. From the private key the public key, which can be shared with everyone, gets derived.

Public key cryptography can be used for encryption or for digital signatures.

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#984
  1. Public-and-private-key cryptography is used to ensure the safe transfer of information in computer networks and/or to authenticate the information that is sent. To achieve this goal the sender of the information uses a private key (known only to that sender) to generate a public key which then in turn—by being public—can be used by the receiver of the information to either decode that information or to verify its origin.
  2. As suggested above, the two major use cases of public-and-private-key cryptography are safe information transfer and information authentication. In the former case a private key is used to generate a public key and also to encrypt a given message so as to render it unintelligible while being in transfer. The decoding of the message is achieved by the receiver by utilizing the public key that the sender generated. In the latter case of authentication, the private key of the sender is used not only to generate a public key but also to produce a digital signature that attaches to the message that is sent. Upon reception of the message the receiver uses the sender’s public key to verify that the digital signature attached to the message was indeed generated by the sender’s private key and in doing so the message is authenticated in the sense that its origin is verified.
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#985

  1. A public key is used to accept coins in a transaction. It is the information used needed if someone wants to pay into associated bitcoin address. The private key is used to send coins out of the wallet associated with it. This information is kept private.

  2. Encryption and digital signatures.

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#986

  1. Private keys are generated at random, from this you can derive a public key. It is impossible to create two identical private keys, this is a one way function so you cannot guess a private key by having access to a public key which anyone can see.

    • The first is message encryption, with a known public key from the person you want to send a message to, you can encrypt a message and that will become illegible to anyone except the person who has the private key that derived the public key used to encrypt the message.
      -Digital signature, which is the use case that cryptocurrencies like bitcoin have adopted. This is to verify a certain message has been send by a specific person. The message sent has to be signed with the public key, this way we can check the signature and public key of the sender and compare this numbers to see if they correspond to the private key who sent the message.
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#987

  1. Private key is a random number which should be kept secret by the owner. Public key is derived from the private key and can be shared with the public. Figuring out the private key by having the public key is impossible.
    The public key can be used by anyone to encrypt a message for you, which will be decoded with the private key only. The other use case is to make a digital signature with the private key and the recipient of the message/money will be able to verify the signature by using the signing person’s public key.

  2. encryption and digital signature

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#988
  1. a private key is a randomly generated string of digits that, using a special formula, will then generate a public key that is further used to create your Bitcoin address. Your private key is essentially your ‘signature’ and verifies your identity. This is a one way formula.
    1. to encrypt
    2. as a digital signature to identify and verify
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#989

1.private key is an private message that stay with me an public key can be send too any one
2.the 2 use cases are encrypyion and digital signatures that verify who did sen the message
the private key derves the public key which make an bitcoin address and it solves the sucurity probelm when u bay or sale bitcoin by using the internet

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