Digital Certificates - Reading Assignment

  1. What is a digital certificate?
    – a public key infrastructure of a public-private key pair functions for use in cryptography and security/authentication between parties

  2. What is the difference between a digital certificate and a public key?
    – the certs enable they keys to be shared

  3. What is the most common use case for digital certificates?
    – they are most commonly used for initializing secure SSL connections between web browsers and web servers and 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. What is a certificate authority?
    – a trusted third party who oversees the ussuance of the certs

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  1. It’s a public key that can use shared, safely, allowing the recipient to verify that sent data is valid.
  2. the public key is used encryption/decryption of a message, the certificate is used for verifiying the owner of the pubic key.
  3. we can proof that a message comes from the owner of the certificate.
  4. a trusted third party which issues certificates
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  • 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.

  • What is the difference between a digital certificate and a public key?
    A: A digital certificate enables entities to share their public key in a way that can be authenticated. Digital certificates are for sharing public keys to be used for encryption and authentication. 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.

  • What is the most common use case for digital certificates?
    A: Initializing secure [SSL] connections between web browsers and web servers.

  • What is a certificate authority?
    A: CAs are trusted third parties that issue digital certificates.

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  1. A digital certificate is used to cryptographically link ownership of a public key with the one that owns it. Digital certificates are for sharing public keys to be used for encryption and authentication.

  2. A private key is held by the owner and is used for signing and decrypting. The public key can be used for encryption of data that is sent to the owner of that specific public key. The digital certificate enables entities to share their public key in a way that can be authenticated.

  3. The most common use case for digital certificates is to secure SSL connections between web browsers and web servers. Digital certificates are also used for sharing keys to be used for public key encryption and authentication of digital signatures.

  4. A lot of digital certificates are issued by a certificate authority (CA). CAs are considered trusted third parties.

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  1. What is a digital certificate?

A digital certificate helps to link ownership of a public key with the entity that owns it.

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

The digital certificates share the certified and authenticated Public Keys while the public keys are used for encryption of the data sent to the public key owner or authentication of the certificate holder’s signed data.

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

Digital certificates are used to ensure that published data has not been changed by any unauthorized entity, and to share keys to encrypt and decrypt the content.

  1. What is a certificate authority?

They are trusted third parties of a Public Key Infrastructure than can issue digital certificates.

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  1. What is a digital certificate or public key certificate?

Used to cryptographically link ownership of a public key to its owner.

Includes the certification of the public key, identifying info about the owner, the metadata relating to the digital certificate, a digital signature of the digital certificate issued by the certificate’s issuer.

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

The certificate is used to verify the authenticity of the public key. Ie. A real world analogy is: an accounting certificate is used to verify that an accountant is actually an accountant and qualified to handle your finances.

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

Initialising secure SSL connections between web browsers and web servers. Also used to authenticate digital signatures and sharing keys for public key encryption.

  1. What is a certificate authority?

A trusted third party that issues digital certificates. It is the involvement of this external third party CA that enables individuals to trust the authenticity of the issued digital certificate.

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  1. a digital private string that links a public key cryptographicaly to a physical entity and identifies it to other parties
  2. a public key is just a number generated privately in order to identify oneself to others, while a digital certificate is a combination of public key, metadata and a digital signature made from the public key
  3. signing things in the digital domain, proving you are the one signing (a contract or similar) or signing-in (establishing secure connections between two entities) to different platforms, so if data is manipulated one knows who the manipulator was, and in the other case, only a trusted source that identifies itself properly electronically can gain access to another platform
  4. a trusted third party with the authority to issue digital certificates, it is a trusted authority or company which has been tried by many users and has become synonimous with DC issuance
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  1. It is a public key certificate, is used to cryptographically link ownership of a public key with the entity that owns it.
  2. A digital signature is used to verify a message. It is basically an encrypted hash (encrypted by the private key of the sender) of the message. The recipient can check if the message was tampered with by hashing the received message and comparing this value with the decrypted signature.
    To decrypt the signature, the corresponding public key is required. A digital certificate is used to bind public keys to persons or other entities. If there were no certificates, the signature could be easily be forged, as the recipient could not check if the public key belongs to the sender.
    The certificate itself is signed by a trusted third party, a Certificate Authority like VeriSign.
  3. They are used by all major 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. A third party that issues certificates in the context of the PK Infrastructure
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[quote=“filip, post:1, topic:6386”]

  • What is a digital certificate?
    This is used to link a public key with the entity that owns the public by using a cryptographic method.They are for sharing public keys that will be used for encryption and authentication.In a digital certificate you will find the public that is being certified,identity information of 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

  • What is the difference between a digital certificate and a public key?
    A digital certificate is a means to authenticate and verify public key, which means a digital certificate can not occur without public key while a public key is used to encrypt the data being forwarded to another public key owner on the network

  • What is the most common use case for digital certificates?
    It is used in web services to secure the content of the service from unauthorized tamperings

  • What is a certificate authority?
    It’s a third party organisation that issues digital certificates.

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  1. 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. Digital certificates are for sharing public keys to be used for encryption and authentication, where as a public key is a large numerical value that is used to encrypt data.
  3. Digital certificates are used in public key cryptography functions; they are most commonly used for initializing secure connections between web browsers and web servers.
  4. Certificate authorities are considered trusted third parties
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  1. Link between the user of a key to the central owner of the key.
  2. The certificate moderates network trust on behalf of central authority. The public key signs transactions and grants you access to BC database.
  3. To initialize secure connections between clients and databases and make sure data is and remains valid and free from corruption. Most common is for web clients and servers.
  4. The issuer of certificates
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  1. It is used to cryptographically link ownership of a public key with the owner. It is a way of sharing the public key.
  2. The public key is used in the encryption process and with the digital certificate you can be authenticated.
  3. The different types of SSL enables more and more rigid authentication.
  • Domain Validated Secure Socket Layer
  • Organisation Validated Secure Socket Layer
  • Extended Validation Secure Socket Layer.
  1. An entity issuing the certificate; that is approving of your participation in the network and of the level of involvement.
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  1. A digital certificate is used to cryptographically link ownership of a public key with the entity that owns it - used for encryption and authentication.
  2. The public key is used by a digital certificate to encrypt and authenticate data. The digital certificate links the ownership of the public key with the entity that owns it.
  3. Used by web clients and servers to authenticate over the internet and provide assurance that content has not been modified by unauthorized parties. Also used to certify the authenticity of patches and software updates.
  4. Trusted third parties that issue digital certificates. Using a trusted third party to issue digital certificates enables individuals to extend their trust in the certificate authority to the trustworthiness of the digital certificates that it issues.
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1 A digital certificate is a way 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 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 To secure SSL connections between web browsers and web servers.

4 A trusted third party that issues digital certificates.

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  1. A digital certificate is an electronic document used to prove the ownership of a public key.

  2. The public key is embedded into a digital certificate with additional information describing the owner of the public key.

  3. The most common use case for digital certificates is to initialize secure SSL connections between web browsers and web servers.

  4. A certificate authority (CA) is a an organization that acts to validate identities and bind them to cryptographic key pairs with digital certificates.

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

Carlos Z.

  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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  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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  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.