Hyperledger: many commands can be manipulated to delete identities or affiliations

Introduction: The Faric-ca data in http body and authorization header for many commands that send from client to server are protected by signature. But I find the identity and affiliation commands still have the risk to be manipulated. Hacker can manipulate most other commands to delete identitie...

Blockchain technology: not just for cryptocurrency

Imagine a place where you can safely store all your personal information and only you decide who has access to it. You can choose which parts of that information you want to share, and you can just as easily revoke that access. If this place ever comes into existence, I am willing to bet it will ...

Replay Attack

github.com/hyperledger/fabric is vulnerable to replay attacks. The library does not verify that the TxID of a transaction is unique, allowing a malicious user to possibly overwrite a currently existing transactionID...

Denial Of Service (DoS) Via Memory Consumption

github.com/hyperledger/fabric is vulnerable to denial of service DoS attacks. The attacks exists because it uses hash field in the protos comparator function to compare two large blocks disseminated. However, it does not prevent sending of arbitrary hash via the hash field of the DataMsg, leading...