Homework on Public and Private Keys - Questions

Blockchain and Bitcoin 101
#4327

  1. Describe the concept of public and private key with your own words.
    A private key is a code only you have that is used for encryption and digital signatures. A public key is a code linked to your private key, but can not be used to decipher, your private key. Your public key can be freely given so people can easily find you.

  2. What 2 use-cases can public key cryptography be used for?
    Encryption and digital signatures/passwords.

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#4328
  1. private key is kept a secret, public key is shared publicly
  2. crypto currency and signing digital assets.
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#4329

  1. A private key is a random, computer-generated number. It is meant to be kept secret and is used to decrypt encrypted information. The public key is generated from the private key. It can be shared with the world wide web and is used to encrypt information. The private key can never be derived from a public key, so this is an example of a one-way function.

  2. a) Encryption of information.
    b) Digital signatures, i.e. identification and integrity of information.

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#4330
  1. Private key is a number generated randomly and need to be keep it secretly. Meanswhile public key is generated using Private key and can be shared.
  2. For encryption and for digital signatures
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#4331

  1. Describe the concept of public and private key with your own words.
    private key is a randomly generated large number and public key is derived from private key using a function which is one-way

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

Used in encryption and digital signature

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#4332
  1. Describe the concept of public and private key with your own words.
    Private key is a large random number generated by the computer.
    Through a special formula, the public key is derived from the private key. There is no way to derive the private key from the public key.
    A public key is used to encrypt a message, but only the private key can be used to decrypt the message.

In the case of digital signature:
Private key is used to sign a message. The receiver will be able to verify that the signature comes from the same private key that generated the public key.

  1. What 2 use-cases can public key cryptography be used for?
  • Encryption
  • Digital signatures - verifying who the sender is
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#4333

  1. A public key is a key that other people can see and use to encrypt data sent to me. The private key is known by me only and is used to decrypt data that is encrypted using my public key. The public key is derived from the private key.

  2. Public key cryptography can be used to send and recieve crypto currencys and also to digitally sign information

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#4334
  1. the private key can arbitrarly be generated and the public key is derived from it while the private key cannot be derived from the public key. the private key than can be used to sign messages (or in this case BTC transactions) so that everyone can check with the public key that the transaction originated from the person owning the private key.
  2. It can be used for signing messages and encrypt messages
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#4335

1.) The public key is derived from the private key. used together it is is kind of like the relationship between a statement, the public key, which is endorsed by your private key as a verification

2.) The public key can be used to encrypt a message sent on a unsecured communication form using encryption and can be used to

the public key can also be apart of verifying a digital signature

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#4336

Private key is a number someone produces for his security that only he knows. Out of this key one can produce a public key through a one-way process that can be shared to anyone else. There is no way to retrieve the private key from the private key

Cryptography (send a msg that through a public channel that can only be read by a specific individual). Someone want to receive safe messages that only he can read.
one can generate a private key and through a one-way process produce a public key that can be send to anyone. Anyone that wants to communicate with the first person can use this public key to encrypt any messages that can be decrypted only with the private key.

Digital signature (verify the identity of a sender of a message).
By using a private key one can leave a digital signature that can be verified by the public key one distributed. Only the this private key can make signatures that can be verified by the public key

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#4337

  1. Public keys are used to send an encrypted message. Private keys are used to decode that message. A user generates a unique private key and a public key is derived from this unique private key. The public key can be shared as it is impossible to derive the private key from the public one (one way process). The message is encrypted with the public key but can only be decrypted with the private key.

  2. Use cases: Encryption and Digital Signatures

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#4338

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

  • In bitcoin, the concept of public and private is to verify who sent a particular message by creating a digital signature with the use of the private key that is generated randomly by your computer. The private key must be kept secured but the public key is what the public sees and use to encrypt messages.

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

  • the first is for encryption and the second is for digital signatures
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#4339

  1. Private Key(secret) generates a Public Key for others to see.

  2. Its used for encryption of messages, Data etc.
    and Digital Signature to verify a transaction.

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#4340

  1. Every wallet has public and private keys. Public key is a computer-generated random, very long number. private key generates a public key. Only the “owner” knows the private key, and gives it to only the persons designated. Public key can be seen by anyone.

  2. Two use cases is encryption for messages and encryption for digital signatures.

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#4341
  1. Private key is the alphanumerical code unique to your Bitcoins by which you can generate a public key. A public key is a secure way of communicating with everyone in blockchain without being copied or understood. Having public key, no one can go reversely and find the private key.
    2- Pubic key s used for both encryption and digital signatures.
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#4342
  1. Public key is derived from the private key. The public key is shared openly and allows a sender of messages to encrypt the messages to send. Only the one who has the private key can decrypt the message. You can always go from the private to the public key, but not the reverse.
  2. Two use cases is for encryption of messages and also in digital signatures
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#4343

1.Well the concept of public and private keys is pretty simple in principal,… they are meant for secure data transfers between parties where unsecure networks make data transfers susceptible to malicious intent. they are derived from completely random numbers that are so very large that it would be nearly impossible to guess which makes the private key secure if the owner doesn’t share it with others freely, but only in a digital signature. another aspect of this concept having high integrity is that it is much like the hash functions in the previous section where the public key cannot reveal the private key from which it comes.
2.The two case scenarios for public key cryptography to be used for are encryption and digital signatures. Both are performed and carried out in much different ways but still achieve “trust” between parties involved.

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#4344
  1. The public key is for the world to see and there is no way to derive the private key from it. The private key has to be kept secret at all times, as it allows access to the funds/information stored under the public address.
  2. The two use cases are encryption and in use for Bitcoin the concept of digital signature. You can tell, which public address was sending a message or funds to you.
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#4345

  1. The public key is seen by the world and allows for others to send things to that address. A private key is tied to your public key and signs packets to show that it was sent by you

  2. It’s used for encryptions and signatures

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#4346

  1. Private key is a number which only I know, whereas a public key is an output generated from my private key and a function

  2. First to encrypt messages (not used by bitcoin), and secondly by signing transactions (relevant for bitcoin).

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