# Slot 5: Pitfalls and Best Practices 201

#### Blog

[**Article on "Security Pitfalls & Best Practices 201"**](https://secureum.substack.com/p/security-pitfalls-and-best-practices-201)

#### Youtube Videos

1. [Block 1](https://youtu.be/WGM1SF8twmw)
2. [Block 2](https://youtu.be/HqHo1jKUnmU)
3. [Block 3](https://youtu.be/pXoEIjHupXk)
4. [Block 4](https://youtu.be/IVbEIbIpWUY)
5. [Block 5](https://youtu.be/QSsfkmcdbPw)

#### Participant Created Content

* [Security Pitfalls & Best Practices 101 and 201 - D-Squared](https://youtu.be/77iL0syhEso)

#### Assignment

* [ ] Read <https://samczsun.com/so-you-want-to-use-a-price-oracle/> and <https://samczsun.com/the-dangers-of-surprising-code/>
* [x] Watch "Security By Design & Smart Contract Audits" by Shayan Eskandari, Ex-ConsenSys Diligence: <https://www.youtube.com/watch?v=gfD1KBtLWZI>
* [x] Watch "How to Build Secure Smart Contracts" by Josselin Feist (@Josselin Feist - Trail of Bits), Trail of Bits: <https://www.youtube.com/watch?v=yP01yH4plT8>
* [x] Watch "White Hat Panel: DeFi Exploits": <https://www.youtube.com/watch?v=Df2zzfoTfMc>
* [ ] Attempt CTF: <https://www.damnvulnerabledefi.xyz/>

#### Quiz

* [Slot 5 quiz](https://github.com/x676f64/secureum-mind_map/blob/master/quizzes/5.%20Pitfalls%20and%20Best%20Practices%20201.md)

#### Quiz Writeups

* <https://ventral.digital/posts/2021/11/14/secureum-bootcamp-security-pitfalls-amp-best-practices-201-quiz>