Digital Certificates - Reading Assignment

Blockchain Business Course
#262

  1. A Digital Certificate is a public key which certifies, by signing, that some data is owned by certain Private Key.

  2. The digital certificate allows entities to share their public key so the data can be verified that comes from them and no other entity.
    The Public Key is created by a Private Key and used to sign or decrypt/encrypt data. Eg: Alice emails Bob, but before sending the message uses one of her private key to encrypt it. The public key is created after hashing the message. The result is a public key which can be used by Bob to decrypt the message and certify it comes from Alice and it has not been modifies.

  3. One of the most common use for the DC is by major websites to assure the users their contents have not been changed, and to share keys for encrypting and decrypting web content.

  4. A CA is a trusted third party which enables individuals to increase their trustworthiness by certifying them.

eg: A Goverment makes you to go a its TaxOffice to issue you a digital certificate after you demonstrate you are who you say you are, then their provide you with a DC to grant you access to other websites which thust the goverment, so they don’t need to double check your identity.

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#263

Excellent answers sir, well documented! Please keep them like that :muscle:

Carlos Z.

#264
  1. What is a digital certificate?
    A digital certificate, also known as a public key certificate, is used to cryptographically link ownership of a public key with the entity that owns it. Digital certificates are for sharing public keys to be used for encryption and authentication.
  2. What is the difference between a digital certificate and a public key?
    Digital signatures are generated using algorithms for signing of data, with the result that a recipient can irrefutably confirm that the data was signed by the holder of a particular public key.
    However, digital certificates themselves are signed digitally, and they should not be trusted unless the signature can be verified.
  3. What is the most common use case for digital certificates?
    They are most often used by web servers and web browsers to authenticate over the internet.
  4. What is a certificate authority?
    Certificate authority is an entity (third party) able to issue digital certificates.
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#265
  1. Also known as a public key certificate, is used to cryptographically link ownership of a public key with the entity that owns it.
  2. A digital certificate differs from a public key in that it is broader. Digital certificates include the public key being certified, identifying information about the entity that owns the public key, metadata relating to the digital certificate and a digital signature of the public key created by the issuer of the certificate.
  3. Digital certificates are most commonly used by web browsers and web servers to provide assurance that published content has not been modified by any unauthorized actors, and to share keys for encrypting and decrypting web content.
  4. Certificate Authority, or CA’s, are considered trusted third parties in the context of a Publick Key Infrastructure; using a trusted third party to issue digital certificates enables individuals to extend their trust in the CA to the trustworthiness of the digital certificates that it issues.
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#266
  1. Digital certificate is a cryptographic link, showing ownership of a public key with the entity, which owns it.
  2. The difference is that the public key is a part of the Digital Certificate, along with other parts, like identifying information about the owner, metadata relating to the digital certificate and a digital signature of the public key.
  3. Initiating secure SSL connections between web browsers and web servers.
  4. Certificate authority is a trusted third party in a context of public key infrastructure.
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#267
  1. What is a digital certificate?
    —another term for it is a public certificate which is used to cryptographically link ownership of the public key with the entity that owns it. It’s used for sharing public keys for the purpose of encryption and authentication
  2. What is the difference between a digital certificate and a public key?
    —A digital certificate has the public key and it clarifies which entities own the public key, whereas public keys encrypt data that is sent to the public key’s owner, or authenticates that the owner signed the data
  3. What is the most common use case for digital certificates?
    —allows entities to share a public key that can be authenticated for secure SSL connections between the web browsers and servers; this assures that the content published has not been modified
  4. What is a certificate authority?
    — in the context of public key infrastructure it is a trusted third party that issues digital certificates
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#268
  1. What is a digital certificate?
    A. A digital certificate is used to cryptographically link ownership of a public key with the entity that owns it.
  2. What is the difference between a digital certificate and a public key?
    A.While digital certificates are used in public key cryptography functions, public key cryptography depends on key pairs, private key to be held by the owner used for signing and decrypting and public key used for encryption of data sent by the owner’s singed data.
  3. What is the most common use case for digital certificates?
    A. Most common use case for digital certificates are web browsers and web servers to provide assurance that the published content has not been modified by any unauthorized actors, and to share keys for encrypting and decrypting web content.
  4. What is a certificate authority?
    A. Certificate authorities are trusted third party in the context of Public Key Infrastructure who issues digital certificates.
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#269
  1. What is a digital certificate?A digital certificate, also known as a public key certificate, is used to cryptographically link ownership of a public key with the entity that owns it.
  2. What is the difference between a digital certificate and a public key?Digital certificates include the public key being certified, identifying information about the entity that owns the public key, metadata relating to the digital certificate and a digital signature of the public key created by the issuer of the certificate.
  3. What is the most common use case for digital certificates? Digital certificates are used in public key cryptography functions; they are most commonly used for initializing secure [SSL] connections between web browsers and web servers.
  4. What is a certificate authority - the vast majority of digital certificates are issued by a certificate authority (CA). CAs are considered trusted third parties in the context of a PKI; using a trusted third party to issue digital certificates enables individuals to extend their trust in the CA to the trustworthiness of the digital certificates that it issues.
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#270
  1. What is a digital certificate?

Also called a public key certificate this links your public key cryptographically to your identity or the entity who owns the key’s identity…

  1. What is the difference between a digital certificate and a public key?

The digital certificate is more than a public key, it allows you to share public keys. The certificate is a hash of your public key (the one you want certified), plus information on your identity, metadata on the digital certificate and your public key.

  1. What is the most common use case for digital certificates?

SSLs IE secure links between servers and wed browsers

  1. What is a certificate authority?

A trusted service provider who can issue certificates on a third party basis.

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#271

A digital certificate, also known as a public key certificate, is used to cryptographically link ownership of a public key with the entity that owns it

Digital certificates are for sharing public keys and public keys are for encrypting data and authentication

Its used by web browsers and web servers for secure communication and to share keys for encrypting and decrypting web content

Certificate Authority is any entity that issues digital certificates to verify the identity of users, applications, or organizations. That is third party certification

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#272
  • What is a digital certificate?
  1. Used to cryptographically link ownership of a public key with the entity that owns it. Certifying, verifying, and identifying the entity and ownership.
  • What is the difference between a digital certificate and a public key?
  1. Digital certificate acts as an authentication layer on the public key. Public key acts like the publicist for the owner’s private key.
  • What is the most common use case for digital certificates?
  1. Digital certificates are used in public key cryptography functions and is most commonly used for initializing secure ssl as a form of connections between web browsers and web services.
  • What is a certificate authority?
  1. trusted third parties who issue digital certificates.
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#273

  1. What is a digital certificate?
    A digital certificate is a public key certificate used to cryptographically link ownership of a public key with the person/entity that owns it.

  2. What is the difference between a digital certificate and a public key?
    Digital certificates include public keys, so it has broader functions than just the public key alone. It has identifying information about the entities that own the public keys, metadata relating to digital certificates, and the digital signature of the public keys.

  3. What is the most common use case for digital certificates?
    It’s most commonly used for secure trusted connections between web servers, browsers, and verifies public keys.

  4. What is a certificate authority?
    It’s a third party entity that uses real world identifying information to verify entities and issue them digital certificates.

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#274

  1. A digital certificate or public key certificate is used to link ownership of a public key and the entity that owns it. They are for sharing public keys used for encryption or authentication

  2. Public key encrypts data and a digital certificate is a declaration of who owns a public key

  3. To provide assurance that published content has not been modified by any unauthorized actors, and to share keys for encrypting and decrypting web content

  4. Trusted 3rd party that issues digital certificates

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#275

  1. What is a digital certificate?
    a cryptographical link of ownership of a public key to the entity of ownership.

  2. What is the difference between a digital certificate and a public key? A public key is the component of a digital cert.

  3. What is the most common use case for digital certificates? web browsing.

  4. What is a certificate authority? trusted 3rd parties who provide digital certs.

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#276

  1. What is a digital certificate?
    – A digital certificate or public key certificate is used to cryptographically link ownership
    of a public key with the entity that owns it.

  2. What is the difference between a digital certificate and a public key?
    – a Public Key is the shared or public portion or counterpart to a secret private key used in
    Public key cryptography; whereas a digital certificate is the mechanism that enables entities to share their public keys in a way that can be authenticated via the Public Key Infrastructure (KPI)

  3. What is the most common use case for digital certificates?
    – Digital Certificates are used for sharing public keys that will be used for encryption and authentication. They include the public key being certified, identifying information about the entity that owns the public key, metadata about the digital certificate, and a digital signature of the public key created by the issuer of the certificate.

  4. What is a certificate authority?
    – A Certificate Authority (CA) is a trusted third-party who issues digital certificates as part of the
    Public Key Infrastructure (PKI) - which is responsible for the distribution, authentication, and
    revocation of digital certificates

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#277

1. What is a digital certificate?
It links ownership of a public key with the entity that owns it. It includes a digital signature of the public key from the issuer of the certificate.
2. What is the difference between a digital certificate and a public key?
The public key can be used for encryption of data and authentication of the certificate holder’s signed data. The digital certificate contains information about the public key as well as the entity who owns it. So the digital certificate holds more thorough information than the public key.
3. What is the most common use case for digital certificates?
They are are most commonly used for initializing secure SSL connections between web browsers and web servers.
4. What is a certificate authority?
A trusted third party in the context of PKI.

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#278

What is a digital certificate?

A provider of information about the identity of an entity, digital certificates are for sharing public keys to be used for encryption and authentication.

What is the difference between a digital certificate and a public key?

The digital certificate holds the public key and with the declaration from certificate it shows who owns the public key. The public key is the “cryptographic data” which is used performing cryptographic functions.

What is the most common use case for digital certificates?

To protect published content on the web to not be modified by any unauthorized parties. Using SSL (Secure Sockets Layer) connections Encrypt data between webbrowser and webserver.

What is a certificate authority?

It is represent a trusted third party

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#279
  1. What is a digital certificate?
    • A digital certificate is also known as a public key certificate, it is used to cryptographically link ownership of a public key to the entity that it belongs to.
  2. What is the difference between a digital certificate and a public key?
    • A public key can be own by anyone, a digital certificate would basically legitimize the identity of a person or entity.
  3. What is the most common use case for digital certificates?
    • They are most commonly used fir initializing secure SSL (Secure Sockets Layer) connections between web browser and web servers. Also used for sharing keys for encryption and authentication purposes.
  4. What is a certificate authority?
    • A certificate authority could be a big corporation or government. Locally this market is fragmented with national or regional providers, base on rules and regulations.
    Internationally this market is largely held by a small number of multinational companies (E.g. IdenTrust, DigiCert, Sectigo)
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#280
  1. What is a digital certificate?

A digital certificate is a digital data record that confirms certain characteristics of persons or objects and whose authenticity and integrity can be verified by cryptographic methods

  1. What is the difference between a digital certificate and a public key?

The digital certificate enables entities to share their public key in a way that can be verfified.
Public keys are used for encryption and authentication.

  1. What is the most common use case for digital certificates?
  • Encrypted connections between a web browser and a web server via HTTPS (Hypertext Transfer Protocol Secure)
  • Encryption and signing of e-mails
  • Signing of digital documents
  • Signing of software and updates
  • Establishing VPN connections (Virtual Private Network)
  1. What is a certificate authority?

Certification authorities play an important role for the public key infrastructure and certificates. They check the information and identity of an applicant for a certificate and issue it if the information is correct. They can also ensure that certificates are published and store them in public directories.

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#281
  1. What is a digital certificate?
    -is used to cryptographically link ownership of a public key with the entity that owns it
  2. What is the difference between a digital certificate and a public key?
    -Public key is only part of the certificate
  3. What is the most common use case for digital certificates?
    -used to link a web server for a domain to the individual or organization that owns the domain
  4. What is a certificate authority?
    -A trusted third party that issues the certificate
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