Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#3142

  1. A private key is a number you generate and keep to yourself. From that you can generate, through a function, your public key. Which can be seen and used by everyone.
    Important is that you can not find the private key through the public key.

  2. Encryption and Digital signature. So secure messaging or signing a transaction.

1 Like
#3143

Public & Private Key Cryptography

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

Public key vs private key is that one encrypts while the other decrypts

  1. What 2 use-cases can public key cryptography be used for?
  • Digital signature for: Identification, Integrity
  • Cryptography
1 Like
#3144
  1. A private key is a random number generated by my computer - it should be kept secret and secure. A public key is also a random number, derived from my private key, it’s available for anyone to see however no one can derive my private key from the public one.
    2.Encryption and Digital signatures.
1 Like
#3145

Homework on Public and Private Keys

  1. Describe the concept of public and private key with your own words.
    A private key is a random number that you can generate in your computer then, by using a special mathematical formula you crete a public key. This process, like the hash functions, is a one way process, this mean that there is no possibility to discover the private key from the public key. The private key need to be kept secure and must not be shared with anyone, the public key can be shared.

  2. What 2 use-cases can public key cryptography be used for?
    Public key cryptography can be used for encryption and for digital signature. Encryption is used for example when you want to send a message to someone by using public network but you do not want that others can read your message. Digital signature is used to verify who sent a particular message. In Bitcoin in order to make a transaction you have to sign it with your private key.

1 Like
#3146

  1. The concept of public and private key is simple. If we want to send a message to someone our computer will generate a private key from which a public key will be generated. The private key is secret and only the person sending the message will have the access of it. Through the public key the message will be sent to the receiver.

  2. 2 uses: encryption and digital signatures.

1 Like
#3147

  1. A private key is a random number that your computer will generate. Your public key is derived from your private key. You can get the public key from the private key but you can never get the private key from the public key.

  2. Encryption and Digital Signatures

1 Like
#3148
  1. The private key its a number that describes how your encryption will behave. The public key is an encrypted information that allows somebody to interact with the private key under certain terms.
  2. Sign contracts, receive money.
1 Like
#3149

1.) A private key is a large random number generated by a computer. A public key is also a large random number but it is generated using the private key. The sender of a transaction uses the public key of the receiver to encrypt. The receiver decrypts using their private key.

2.) Digitally sign transactions and to encrypt messages.

1 Like
#3150

Just that it was a broadcasted transaction for the second part.

#3151
  1. Private key - an encryption specialized for yourself to decrypt sent/read messages from your public key.
  2. Digital signature and validity of encryption.
1 Like
#3152

Homework on Public and Private Keys - Questions

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

The private key is what signs the transaction and has to be kept private.
The public key is generated from the private key.

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

Encryption or digital signature.

1 Like
#3153

Both of these utilize digital signatures, other use case would be encryption. :slight_smile:

#3154

A public key is generally your connection to the chain that others can see, a private key is your way of opening encrypted content, messages and signature, validating your Identity

1 Like
#3155

Describe the concept of public and private key with your own words.
Public key and private key are used to encrypt and decrypt messages. The encrypted message can only be decrypted by the recipient who has the private key. .

What 2 use-cases can public key cryptography be used for?
Encryption & Digital signatures

1 Like
#3156

Public key/private key concept.
A public key is a a numerical address of sorts and something that you use for receiving money and sending messages and not worry about it not giving up your private key that is just that, a private key that is only for you. The private key can also create a digital signature for the public key on messages.

Two use cases
Encrypting communication and sending crypto assets to hot wallets from cold wallets and cold wallets to hot wallets or platforms to sell the crypto assets.

1 Like
#3157

  1. A private key is just a random number, chosen to be used for cryptography purposes, so suitably large. A public key is another number which has been derived from the private key through a particular mathematical formula. The derivation is capable in one direction so that one cannot deduce the private key from the public key.

  2. The two use cases for public key in cryptography are A) encryption over unsecure media or B) Signing to verify sender.

1 Like
#3158
  1. Public keys are generated from private key and is used as an open key for others to see when activity has come from it. The private key, however, is never shown and is only used as the access to the contents of the public key, with nothing else being able to access it but the private key itself.
  2. It can be used for general encryption, as well as adding a digital signature to a message for a different but similar means of encryption.
1 Like
#3159

1 and 2 The private key is used to read a encrypted message or as a signature. The public key is used to encrypte a message you send (you use the recievers public key to encrypte) or to verify that a signature comes from the right person.

1 Like
#3160
  1. Describe the concept of public and private key with your own words.

A private key is an encrypted personal key that is used to safely transact crypto, in the case of digital signatures. For example, when a bitcoin wallet is being used, a private key is then generated by a computer that in turn creates a derived public key. The private key is used to send the crypto The private key also creates the digital signature and the public key creates a crypto address to receive said crypto. It is a one-way mechanism.

  1. What 2 use-cases can public-key cryptography be used for?
    The two use cases are for encryption in the non-crypto world and for digital signatures, which bitcoin is very reliant on.
1 Like
#3161
  1. Describe the concept of public and private key with your own words.
    A private key is a large, randomly generated number meant to be kept secret by the owner. A public key is from the private key and is shared for anyone to see. A message being sent between two people is encrypted with a public key. Only the owner of the private key can decrypt the message. The private key is used to ‘sign’ the message being sent.
  2. What 2 use-cases can public key cryptography be used for?
    Encryption and digital signatures.
1 Like