Summary
This chapter introduced blockchain security. We started by discussing a layered model of the blockchain ecosystem and its components. After this, we introduced attacks at different layers and how they can be mitigated. Moreover, we introduced the tools that can be used to analyze smart contracts and identify vulnerabilities. We also introduced STRIDE, which can be used to model threats in the blockchain ecosystem. In the next chapter, we will introduce identity, which is a major area of interest in the blockchain world. Note that blockchain security is a vast and deep subject and we cannot cover everything in a single chapter. However, this should provide a solid foundation to research further.
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