Meeting summary: Monero Research Lab, 27 April 2022

This is a comprehensive summary, with added reference links, of the Monero Research Lab meeting from April 27th 2022, 1700 UTC.

Logs

The raw, unedited, full log file for this meeting:

220427-mrl.log (108 lines)

Summary

Note: it is possible that some relevant information may be missing from this summary; read the full log file for the complete, unedited discussion.

• Participants: 10 (UkoeHB¹, selsta², jberman³, xmr-ack⁴, mj-xmr⁵, Rucknium⁶, cryptogrampy⁷, kayabaNerve⁸, merope⁹, gingeropolous¹⁰)

• (1) Updates

  • (1.1) on Seraphis¹¹:

  • UkoeHB implemented binned reference sets and plans to work on the 16/2 jamtis address index discussion/possible implementation, then discretized fees

  • (1.2) on statistical analysis:

  • mj-xmr reported progress with the decoy selection algo analysis¹², having summarized both the results and the strategy, and is planning to perform statistical analysis with Rucknium and jberman

  • mj-xmr mentioned the next (parallel) task of simulating the behavior of the system (fee and block size) in case of a sudden increase of transactions

  • Rucknium is working on estimating the effect (if any) of Minexmr’s increase in its pool fee from 1.0% to 1.1% on April 1st¹³

  • (1.3) on view tags and security:

  • jberman added support for view tags to the block explorer + monero-lws, helped add support for view tags to monero-python, and helped patch a vulnerability reported by kayabaNerve¹⁴

• (2) Larger JAMTIS¹⁵ address tags (and address indices)

  • UkoeHB explained the address tag’s MAC and how increasing the size from 8 -> 18 will increase the blowfish ciphers from 1 to 3, but increasing the mac from 1 -> 2 bytes will reduce the cost of filter-failures by 1/256

  • jberman pointed out that 10 bytes per output would probably be more significant if the idea to have all tx’s use 16 outputs was implemented¹⁶

  • UkoeHB mentioned plans to do performance tests comparing 7/1 vs 16/2 jamtis address tags (size in bytes)

• (3) Ending comments

  • cryptogrampy mentioned HotShop¹⁷

  • selsta was looking for someone to do an updated multisig writeup of the cryptography that should help the next audit (preferably before the launch of Haveno)

  • Rucknium suggested MAGIC¹⁸ could help fund the writeup and audit, and pinged coinstudent2048

  • jberman pinged dangerousfreedom for the task

Let me know if you find this kind of report helpful. If not, I will redirect time spent on this to other tasks.

Feedback, edits always welcome @/about.

-3RA