Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#2621
  1. Public key is derived from private key, when a wallet it created, but there is no way to get from public key to private key.
  2. Encryption and Digital signature
1 Like
#2622
  1. Describe the concept of public and private key with your own words.
    It is to encrypt messages, transactions, etc to ā€œsaveā€ your info, you cannot go from public to private, but you can go private to public.
  2. What 2 use-cases can public key cryptography be used for?
    Like I said, to transactions and to safe information
1 Like
#2623

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

 Public and private keys are produced when a wallet is created.  
 PUBLIC KEYS allows users to send encrypted messages and confirm a signature signed by 
 someone's private key.  
 PRIVATE KEYS(also known as DIGITAL SIGNATURE) enables you to securely decrypt a 
 message.  You can sign your message with your private key so that the recipients can know 
 that the message could only have come from you.

2.) What 2 use-cases can public key cryptography be used for?
The 2 major use cases are ā€¦
a.) Encryption- used to send private messages and
b.) Digital Signatures- Identifies the senders and ensures the integrity of the message.

1 Like
#2624
  1. Describe the concept of public and private key with your own words.
    Public and private keys are a way to send/receive information without other people having access. Public key can be seen by the masses but is useless without the private key.
  2. What 2 use-cases can public key cryptography be used for?
    Encryption of date and digital signatures
1 Like
#2625

  1. The concept of a private key is to have a mathematically generated number, unique to you, that can be used to decrypt information meant for you and only available to you.
    The concept of a public key is to be able to verify encrypted information/messages/transactions that are available for everyone to see. Your public Key derives from your Private key.

  2. Signatures + encryption.

1 Like
#2626

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

The private key is a random number that you, yourself, generate. ItĀ“s superimportant that you store it safe or remember this private key. The private key genereate a public key which is not sensitive for anyone to see. The public key is used to generate your bitcoin address and to verify that itĀ“s actually you who are communicating (as the public key is linked in pair with your private key.

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

  1. Encryption, in terms of making a message to be encrypted.
  2. Digital signatures, when rather using the private key along with the signature can verify and be compared with the public key.
1 Like
#2627

Correction: Public key cryptography can be used for digital signatures of cryptocurrency transactions and encrypting messages sent over the open internet.

1 Like
#2628

You mentioned encryption, but transactions utilize digital signatures. :slight_smile:

1 Like
#2629

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

  1. Public Key: generated based on the private key (mathematical equation), the public key can be seen by everyone.
  2. Private Key: randomly generated sequence of numbers which is kept private.

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

  1. Encryption (Secret Messaging)
  2. Digital Signatures (Identify yourself & Integrity of message)
1 Like
#2630
  1. A public key created using the private key. It cannot be reversed. This means that no one would be able to use the public key to find the private key. The private key is also to be kept secret and secured to keep your information safe. The public key is visible to all.
  2. Use cases: 1. for encryption
    2. for digital signatures
1 Like
#2631

1- the public key is a publicaly visible encoded version of the private key, which is private only. a private key is like my own signature which i need to keep private for none to copy it. the public key is backed by the private key and cant be copied without acces to private key.

  1. encryption and digital signatures
1 Like
#2632

  1. Private key generates the public key, the public key can be shared with anyone . There is no way to find out the private key from having the public key.

  2. Encryption and Digital Signatures

1 Like
#2633
  1. A private key is a generated random number used to sign a message. A public key is used to verify the message signature.
  2. One use case is to protect data at rest. A second use case is sending an encrypted message.
1 Like
#2634

Technically if you want to protect data, you would use encryption as well. If you want to ensure data integrity you would use digital signatures. :slight_smile:

1 Like
#2635

Homework on Public and Private Keys - Questions

Q1: Describe the concept of public and private keys with your own words.
A1: In order to create an environment for encrypted data private keys act as identification numbers to share data. The private key is the main key which is immutable, the public key is generated from the private key. Public keys are pre-image resistant and will not help in deciphering the private key but the private key does confirm the public key is generated.

Q2: What 2 use-cases can public key cryptography be used for?
A2: First use case is a digital signature that is used to verify the sender and receiver of a transaction and the second is encrypted data for sharing data privately over a public network.

1 Like
#2636
  1. Describe the concept of public and private key with your own words.

Private is your secretive key that gives you access to your wallet and coins . It can also be used to E sign off messages to other people.

Public is the key that everyone can and that key is derived from your private key.

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

The first case is where you use your private key to create a public key which then encrypts other persons message and the. You use your private key to decrypt the message .

The 2nd use is when you use your private key to sign off on the message and the person looks at your public key and the the signature and by using math to see if it corresponds with your private key .

1 Like
#2637
  1. A Public Key is the first part of the encrypted message created from a public. An Address. Other people may have your Public Key with no threat to you or your funds.

A Private Key is a large group of randomly generated numbers used decrypt a Public Key Message. It is impossible to derive the Private Key from the Public Key however. The numbers/factorials are too large.

  1. Public Key Cryptography can be used to encrypt a message on a public space, and to create a Digital Signature to identify oneself or their wallet.
1 Like
#2638
  1. Public & Private keys are designed for engaging in encrypted and/or trusted communication between 2 parties.
  2. A) encrypted communication via mutually-authenticated certificates. The public key of both parties is shared openly, and is used to initiate the SSL negotiation.
    B) digital signatures for identity verification
1 Like
#2639

1)the private key is a random number generated by the computer , and then we generate the public key from it . these two keys are mainly used for ecryption of messages, or digital signatures(identification) .the transmetter(T) uses the public key of the receiverĀ® to encrypt the message and then sign on it using his private key(T), then the reciever can read the message only and only if he got the pricate key of the public key sent toĀ®. and then the reciever can verify the identity(the signature) of the transmetter using his public key(T).

2)encryption and digital signatures

1 Like
#2640

Thanks for the correction!

Cheers.