Digital Certificates - Reading Assignment

Blockchain Business Course
#202

Digital Certificates - Reading Assignment

1. What is a digital certificate?

  • A digital certificate authenticates the credentials of the sender and lets the recipient of an encrypted message know that the data is from a trusted source or a sender. Digital certificates are also known as public key certificates or identity certificates; essentially a digital certificate is used to cryptographically link ownership of a public key with the data that it claims to own.

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

  • In cryptography, a public key certificate (also known as a digital certificate or identity certificate) is an electronic document which uses a digital signature to bind/link together a public key with an identity — information such as the name of a person or an organization, their address, and so on.

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. Digital certificates are also used for sharing keys to be used for public key encryption and authentication of digital signatures.

4. What is a certificate authority?

  • A certificate authority or certification authority (CA) is an independent trusted entity that issues digital certificates. This allows others (independent parties) to rely upon signatures or on assertions made about the private key that corresponds to the certified public key.
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#203

Excellent answer sir! really well documented! keep it like that please! :muscle:

Carlos Z.

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#204
  1. Digital Certificate is used to cryptographic-ally link ownership of a public key with the entity that owns it.
  2. Digital certificates are used for both encryption and authentication. A public key is only used for encryption.
  3. Most common use case in with SSL where secure connection between web browsers and web servers.
  4. CA’s are a trusted third party for issuing most digital certificates.
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#205

  1. What is a digital certificate?
    A digital certificate links public keys to their owners. They can then be used to encrypt and authenticate.

  2. What is the difference between a digital certificate and a public key?
    Public keys are dependent its pair, private key. They create signatures which are generated algorithmically. Digital certificates hold more information about the owner of a public key.

  3. What is the most common use case for digital certificates?
    To make sure that content was not modified by any unauthorized actor.They are also used to share keys to be used to authenticate digital signatures.

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

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#206

  1. What is a digital certificate?
    It is a public key certificate used to link the ownership of public key with the end user or entity.

  2. What is the difference between a digital certificate and a public key?
    A digital certificate can be used for public key encryption and authentication. A public key does not have an authentication process.

  3. What is the most common use case for digital certificates?
    linking web browser and web servers in the form of SSL certificates.

  4. What is a certificate authority?
    a trusted third party that issues digital certificates.

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#207

  1. digital certificates is used to cryptography link ownership of a public key with entity that owns it.

  2. Public key cryptography requires a private key pair to sign transactions while a digital certificate contains public key and is a deceleration of who owns it.

  3. Digital certs are used most commonly by web browsers to authenticate web contents

  4. Certificate authority is a trusted third party issuer

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#208

  1. What is a digital certificate?
    -Used to cryptographically link ownership of a public key to its owner.

  2. What is the difference between a digital certificate and a public key?
    -A digital certificat includes the public key and metadata of the owner/entity its encrypting. A public key comes in a pair with a private key, where the public key encrypts data that only the private key can decrypt.

  3. What is the most common use case for digital certificates?
    -when exchanging information over the internet, for instance, web sites.

  4. What is a certificate authority?
    -a trusted third party organization that issues digital certificates.

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#209

What is a digital certificate?
A way to share public keys and identifying info for encryption and authentication.

What is the difference between a digital certificate and a public key?
A public key may be used for encryption and authentication, while the digital certificate enables entities to share their public keys for authentication.

What is the most common use case for digital certificates?
For secure connections between web browsers and web servers. In this application, digital certificates provide assurance that published content has not been modified by unauthorized actors.

What is a certificate authority?
Trusted third parties that issue digital certificates.

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#210

  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. Digital certificates are for sharing public keys to be used for encryption and authentication

  2. Public key cryptography depends on key pairs: one a private key to be held by the owner and used for signing and decrypting, and one a public key that can be used for encryption of data sent to the public key owner or authentication of the certificate holder’s signed data. The digital certificate enables entities to share their public key in a way that can be authenticated

  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. The vast majority of digital certificates are issued by a certificate authority and they are the considered trusted third parties

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#211

  1. It used for sharing public key to be used for encryption and authentication. It links the owner with the puplic key.

  2. A public key is a form of digital certificate but not vise versa. The digital certificates are also used for sharing public keys and authintication of digital signatures.

  3. The most common use case for certificates are initializing secure SSL connections between web browsers and web services.

  4. A trusted entity (3rd party) that provides the certificates. Example, PKI

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#212
  • What is a digital certificate?
    Is used for sharing public key’s
  • What is the difference between a digital certificate and a public key?
    A public key is a key for a digital certificate.
  • What is the most common use case for digital certificates?
    Web browser user authentication and webservices
  • What is a certificate authority?
    A party that delivers certificates (pki)
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#213

1. What is a digital certificate?
It is a public key certificate which is used to cryptographically link ownership of a public key with the issuer, or the entity that owns it.

2. What is the difference between a digital certificate and a public key?
Certificate is a container that holds information about certificate holder/owner and public key . Private key is raw key material without any extra information. For example, from private key you can’t extract information about owner of the key, or a certificate that this private key is associated with. Certificate is often called as public certificate , because it contains only public key and public information.
Possessing the public certificate only doesn’t prove certificate ownership. Only possession of private key that is associated with public key embedded in public certificate can prove certificate ownership.

3. What is the most common use case for digital certificates?
Authentication and Authorization mechanisms using SSL/TSL protocols for clients and servers to communicate in secure ways.

4. What is a certificate authority?
A trusted authority in the context of Public Key Infrastructure (PKI), which is issuing digital certificates.

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#214

  1. public key certificate, used to cryptographically link ownership of 2 public key with the entity that owns it. Digital certificates are for sharing public keys to be used for encryption & authentication.

  2. public key cryptography depends on key pairs: on a private key to be held by the owner, and oneon a publiic key that can be used for encryption of data sent to the public key owner of authentication of the certificates holders signed data. The digital certificate enables entities ot share their public keys in a way that can be authenticated.

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

  4. vast majority of digital certificates are issued by a certificate authority (CA). CA’s are considered trusted third parties

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#215

  1. A digital cetificate is the link between a public key and its owner.

  2. Public key cryptography depends on key pairs. Digital certificates are used in public key cryptography functions; they are most commonly used for initializing secure connections between web browsers and web servers.

  3. Providing cryptographic assurance and privacy of data, integrity and trust.

  4. 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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#216
  1. What is a digital certificate?

Used to share public keys, that links the owner to the public keys.

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

Public key cryptography enables several different functions, including both encryption and authentication.

A digital signature is another one of those functions enabled by public key cryptography; 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.

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

SSL and securing websites

  1. What is a certificate authority?

Trusted third party that issues a Digital Certificate

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#217

  1. What is a digital certificate?
    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 keys are included in digital certificates. They are used by these last ones for encryption and authentication.

  3. What is the most common use case for digital certificates?
    Are most used in to secure SSL connections between web browsers and servers, also in digital signatures

  4. What is a certificate authority?

Is a trusted third parties entities that issues digital certificates.

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#218
  1. A digital certificate is a pseudo authenticator to confirm that the user is in fact who he says he is (for as long as it is verified)
    2.A digital certificate does not necessarily involve any keys. It is a certificate meant to replace keys. but it’s authenticity should still be verified
  2. Digital certificates are used to authenticate the secure connection in an SSL link (for instance for payments, etc). This secure connection can be seen next to the browser address bar in the form of a small lock that is closed.
  3. A Certificate authority is a trusted third party who issues certificates, eg. SGS/DNV, Bureau Veritas etc…
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#219

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

  2. The difference between a digital certificate and a public key is that a public key is a method used to encrypt data, and a digital certificate is mechanism which allows people to prove ownership of, and share, their public keys.

  3. The most common use case for digital certificates is for initialising SSL (Secure Sockets Layer) connections between web browsers and web servers.

  4. A certificate authority is a trusted third party which issues digital certificates.

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#220
  1. Links ownership of a public key with the entity that owns it- basically authenticates people’s public keys
  2. The digital certificate contains the public key and authenticates it, the public key itself is used for encrypting and signing transactions
  3. They are most commonly used to initialize SSL connections between web browsers and web servers.
  4. A CA is a trusted third party that issues digital certificates
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#221

is also a public key certificate, it is used to link cryptographically the ownership of a public key

public key is eg the digest (Hash-Output) of an SHA256-Input (private-key)
the certificate includes 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

The distribution, authentication and revocation of digital certificates are the primary purposes
of the public key infrastructure (PKI), the system by which public keys are distributed and authenticated.
The digital certificate enables entities to share their public key in a way that can be authenticated.
-SSL
-as assurance that webpages are not being modified
-to share keys for public-key-encryption and authentication of signature
Digital certificates are also used in other contexts, both online and offline,
for providing cryptographic assurance and privacy of data.

A certificate authority (CA) is a trusted entity that issues digital certificates.
A CA acts as a trusted third party—trusted both by the subject (owner)
of the certificate and by the party relying upon the certificate.
The format of these certificates is specified by the X.509 or EMV standard.

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