The DeFi Market in November Experienced a "Disaster"

In November 2020, various security incidents occurred frequently in the blockchain field. Compared to the mitigated security incidents in October, the situation this month has deteriorated. According to incomplete statistics, more than 27 typical security incidents occurred in November. This month, especially in the DeFi field, hackers executed a series of protocol "attack performances" as if they had undergone concentrated rehearsals. Among them, reentrancy attacks, oracle attacks and other means, with the assistance of flash loans, demonstrated powerful destructive force.