Privacy-Preserving and Reward-Based Mechanisms of Proof of Engagement

Proof-of-Attendance PoA mechanisms are typically employed to demonstrate a specific user's participation in an event, whether virtual or in-person. The goal of this study is to extend such mechanisms to broader contexts where the user wishes to digitally demonstrate her involvement in a specific...

A Review on Privacy in DAG-Based DLTs

Directed Acyclic Graph DAG-based Distributed Ledger Technologies DLTs have emerged as a promising solution to the scalability issues inherent in traditional blockchains. However, amidst the focus on scalability, the crucial aspect of privacy within DAG-based DLTs has been largely overlooked. This...

Blockchain Application in Metaverse: a Review

In recent years, the term Metaverse emerged as one of the most compelling concepts, captivating the interest of international companies such as Tencent, ByteDance, Microsoft, and Facebook. These company recognized the Metaverse as a pivotal element for future success and have since made significa...

Authentication flaw

Impact: The library offers a function to generate an ed25519 key pair via Ed25519KeyIdentity.generate with an optional param to provide a 32 byte seed value, which will then be used as the secret key. When no seed value is provided, it is expected that the library generates the secret key using...

GHSA-C9VV-FHGV-CJC3 agent-js: Insecure Key Generation in `Ed25519KeyIdentity.generate`

Impact The library offers a function to generate an ed25519 key pair via Ed25519KeyIdentity.generate with an optional param to provide a 32 byte seed value, which will then be used as the secret key. When no seed value is provided, it is expected that the library generates the secret key using...

agent-js: Insecure Key Generation in `Ed25519KeyIdentity.generate`

Impact The library offers a function to generate an ed25519 key pair via Ed25519KeyIdentity.generate with an optional param to provide a 32 byte seed value, which will then be used as the secret key. When no seed value is provided, it is expected that the library generates the secret key using...

Financial Cybercrime: Following Cryptocurrency via Public Ledgers

This is Part II of a two-part series on how cybercrooks embrace and use cryptocurrency. To read Part I, please click here. While Bitcoin transactions are anonymous, it’s possible to follow the money through public ledgers to see what those transactions actually are and how they flow. This allows ...