update dipersion attack; add tabletop-discussion.md

tabletop-discussion.md

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+# Table-top discussion
+
+
+## Documentation and Tutorials
+1. [Enrollment](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/docs/enrollment_diagram.md)
+2. [Login](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/docs/login_diagram.md)
+3. [Cipher and Renew](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/docs/encipher_decipher_renew_nkode.md)
+4. [nKode API Tutorial 1](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/notebooks/Enrollment_Login_Renewal_Simplified.ipynb)
+5. [nKode API Tutorial 2](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/notebooks/Enrollment_Login_Renewal_Detailed.ipynb)
+6. [Dispersion Tutorial](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/notebooks/Dispersion.ipynb)
+7. [Split Shuffle](https://git.infra.nkode.tech/dkelly/pynkode/src/branch/main/notebooks/Split_Shuffle.ipynb)
+
+## Discussion Topics
+### nKode Length
+[Memorized Secret](https://pages.nist.gov/800-63-3/sp800-63b.html#memsecret) `Memorized secrets SHALL be at least 8 characters in length if chosen by the subscriber. Memorized secrets chosen randomly by the CSP or verifier SHALL be at least 6 characters in length and MAY be entirely numeric.`
+- The minimum entropy for a randomly chosen memorized secret is approximately 20 bits.
+- A keypad with 6 keys, each having 9 properties, exceeds this requirement with a minimum 4-character nKode, providing approximately 23 bits of entropy.
+
+### nKode Observation
+- Cracking an nKode [Evil nKode](https://git.infra.nkode.tech/dkelly/evilkode)
+- Replay Attack
+
+### Dispersion Attack
+
+### nKode Over low-bandwidth
+
+### nKode Over Unencrypted Channel
+- TOTP
+- DARC