1. Intel SGX Home [Link] Code Samples and Tutorials [Link]
2. Academic Research Papers on Intel's Website [Link]
   this research is very hot. you can see a lot of papers in intel official's site.

1. Intel SGX Explained [PDF]
2. Review of Side Channel Attacks on SGX, by Yueqiang, in Chinese [PDF]

There are a lot of active and rapid researches on arXiv and IACR ePrint. Search the key word sgx or enclave.

1. Controlled-Channel Attacks: Deterministic Side Channels for Untrusted Operating Systems, IEEE S&P 2015 [PDF] [Slides]
   the very first paper about the controlled side channel leakages, such as page fault, cache, and TCB
2. Preventing Your Faults from Telling Your Secrets: Defenses against Pigeonhole Attacks, asiaccs 2016 [PDF] [Slides]
   a paper after the untrolled side channel attacks on SP. more the hardware countermeasures
3. High Resolution Side Channels for Untrusted Operating Systems, USENIX ATC 2017 [PDF] [Slides] [Audio]
   a paper after the untrolled side channel attacks on SP. more the hardware countermeasures
4. Inferring Fine-grained Control Flow Inside SGX Enclaves with Branch Shadowing, USENIX 2017 [PDF]
5. CacheZoom: How SGX Amplifies The Power of Cache Attacks, arXiv 2017 [PDF]
6. Software Grand Exposure: SGX Cache Attacks Are Practical, USENIX WOOT 2017 [PDF]
7. Malware Guard Extension: Using SGX to Conceal Cache Attacks, DIMVA 2017 [PDF]
8. Stacco: Differentially Analyzing Side-Channel Traces for Detecting SSL/TLS Vulnerabilities in Secure Enclaves, ccs 2017 [PDF] [Slides]
9. Leaky Cauldron on the Dark Land: Understanding Memory Side-Channel Hazards in SGX, ccs 2017 [PDF]

1. Iron: Functional Encryption using Intel SGX [PDF] [Slides]
   a nice paper in ccs2017. a formal and nice proof.
2. Robust Synchronous P2P Primitives Using SGX Enclaves, by Yaoqi Jia [PDF] [Chinese]

1. SGXIO: Generic Trusted I/O Path for Intel SGX, CODASPY 2017 [PDF]
2. HardIDX: Practical and Secure Index with SGX, DBSec 2017 [PDF]
3. T-SGX: Eradicating Controlled-Channel Attacks Against Enclave Programs, NDSS 2017 [PDF]
4. SGX-Shield: Enabling Address Space Layout Randomization for SGX Programs, NDSS 2017 [PDF]