Great blog series by Dr. Marco Balduzzi (Trend Micro) that delves into the risks associated with the adoption of private blockchains in enterprises, providing use cases and concrete examples of associated problems.

Part 1: https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/unchaining-blockchain-security-part-1-the-emerging-risks-of-private-blockchains-in-enterprises
Part 2: https://www.trendmicro.com/vinfo/ph/security/news/cybercrime-and-digital-threats/unchaining-blockchain-security-part-2-how-private-blockchains-are-used-in-enterprises
Part 3: https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/unchaining-blockchain-security-part-3-exploring-the-threats-associated-with-private-blockchain-adoption