CBDH Identity & Certificate Management 3

Question 1

What is Idemix (Identity Mixer) in Hyperledger Fabric?

Accepted Answer

A privacy-preserving credential scheme that allows anonymous transactions

Answer

Idemix is a cryptographic protocol in Fabric that provides privacy-preserving credentials, allowing users to prove membership in an organization without revealing their specific identity.

Question 2

What is an intermediate CA in Hyperledger Fabric?

Accepted Answer

A CA that is signed by a root CA and can issue certificates to end entities

Answer

An intermediate CA is a CA whose certificate is signed by a root CA, providing an additional trust hierarchy layer and isolating the root CA from direct certificate issuance.

Question 3

How is a client's identity accessed within Hyperledger Fabric chaincode?

Accepted Answer

Using the ClientIdentity object from the chaincode shim package

Answer

Chaincode uses the `ClientIdentity` interface from the `github.com/hyperledger/fabric-chaincode-go/pkg/cid` package to access the invoking client's identity, attributes, and certificates.

Question 4

What is the BCCSP in Hyperledger Fabric?

Accepted Answer

Blockchain Cryptographic Service Provider, which handles cryptographic operations

Answer

BCCSP (Blockchain Cryptographic Service Provider) is the pluggable interface in Fabric that abstracts cryptographic operations such as key generation, signing, hashing, and verification.

Question 5

What happens to a Hyperledger Fabric identity when its certificate is added to a Certificate Revocation List (CRL)?

Accepted Answer

The identity is revoked and can no longer participate in any network operations

Answer

Adding a certificate to the CRL revokes that identity, preventing it from authenticating or participating in any network operations such as sending transactions or queries.

CBDH - Certified Blockchain Developer Hyperledger Practice Test

CBDH - Certified Blockchain Developer Hyperledger Practice Test

CBDH Identity & Certificate Management 3