19:11

S2025:E04 Jun 26, 2025

Rucknium - OSPEAD: Optimal Ring Signatures (MoneroKon 2025)

OSPEAD estimates the age distribution of the real spend in Monero’s ring signatures. Monero’s decoy selection algorithm could be changed to closely mimic the real spend age distribution, yet an anti-privacy adversary can also use the real spend distribution to execute the MAP Decoder attack on past ring signature data. The attack raises the probability of correctly guessing the real spend in a 16-member ring from 6.25% to 23.5%, on average. Multiple nonstandard decoy distributions are modeled as repeated measurements drawn from unknown distributions components, then estimated by the method of Bonhomme, Jochmans, & Robin (2016). The age distribution of ring signatures associated with a given decoy distribution is modeled as a two-component mixture distribution. The decoy distribution is subtracted from the on-chain data distribution to obtain the real spend distribution.

21:17

S2025:E03 Jun 26, 2025

Justin Ehrenhofer - Overview of the Last Year of Audits, Reviews, and Proofs (MoneroKon 2025)

This presentation gives an overview of Monero reviews and audits related to FCMP++ and Serai. Justin from MAGIC Grants will discuss the importance of these reviews, how the vendors were selected, what their outcomes were, and what is next. Founder of Moonstone Research, senior director at NAXO, Justin Ehrenhofer is Board Member and President of MAGIC Grants, a 501(c)(3) public charity that provides scholarships for students interested in cryptocurrencies and privacy, supports public cryptocurrency infrastructure, and promotes privacy. magicgrants.org

25:05

S2025:E02 Jun 26, 2025

Rucknium, Boog900, xenu - Defeating Spy Nodes on the Monero Network (MoneroKon 2025)

According to recent analysis by the Monero Research Lab, one or more anti-privacy adversaries have set up many spy nodes on the Monero network, composing up to 40 percent of reachable node addresses. Connections to these spy nodes would make up an estimated 15 percent of the privacy-sensitive outbound connections established by honest nodes that use the default configuration. This talk will quantitatively estimate the privacy impact of spy nodes even when Monero’s Dandelion++ protocol is used. The following countermeasures will be evaluated: opt-in IP address ban lists, anonymity networks like Tor and I2P, a Dandelion++ alternative called Clover, subnet de-duplication, and protocols that verify that an internet address is really operating a distinct node. The Confidentiality, Integrity, and Availability triad in information security will guide comparisons of these countermeasures.

29:44

S2025:E01 Jun 26, 2025

Luke Szramowski - FCMP Divisors: The Inside Scoop (MoneroKon 2025)

Luke Szramowski from Cypher Stack talks about some of the difficulties regarding the research into divisors. Luke Szramowski is a mathematical researcher, with a Bachelor’s Degree in Mathematics and two Master’s Degrees, one in Math, with a focus in Number Theory and another in Math with a focus in Coding Theory. In his free time, Luke works on a litany of different math problems, mainly regarding Number Theoretic conjectures and playing all different types of games.