Tootfinder

Each week, Metacurity offers our free and paid subscribers a digest of the best long-form (and longish) infosec-related pieces we couldn't properly fit into our daily news crush.
This week's selection covers
--N. Korea's IT worker scheme ensnared a troubled woman,
--Iran is harvesting millions of airline passengers' data,
--Myanmar is isolated in its digital tyranny,
--Pushing the UK to abandon its encryption backdoor,
--The racist hacker …

Best infosec-related long reads for the week of 7/19/25
N. Korea's IT worker scheme ensnared a troubled woman, Iran is harvesting millions of airline passengers' data, Myanmar is isolated in its digital tyranny, Pushing the UK to abandon its encryption backdoor, The racist hacker attacking universities, Making quantum cryptography stronger

It's an election year, and he needs the votes.
Adams Retreats From Medicare Advantage Effort | Portside
https://portside.org/2025-06-20/adams-retreats-medicare-advantage-effort

I love that this accidental shot emerged, well by accident, in #midjourney. #aiphotography
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It's Friday and don't stop work for the weekend before you check out today's Metacurity for the most critical infosec developments you should know, including
--Cyber incident disrupts Hawaiian Airlines, but flights are unaffected
--Food distributor UNFI restores operations,
--Danish gov't wants people to own copyrights to their bodies, faces and voices,
--N. Korea is automating crypto theft with AI tools,
--Pro-Iranian hacktivists leaked Saudi Ga…

Cyber incident disrupts Hawaiian Airlines, but flights are unaffected
Food distributor UNFI restores operations, Danish gov't wants people to own copyrights to their bodies, faces and voices, N. Korea is automating crypto theft with AI tools, Pro-Iranian hacktivists leaked Saudi Games records, Cambodia has been negligent in cybercrime compound crackdowns, much more

On the semigroup of endomorphisms of the semigroup $\boldsymbol{B}_{\omega}^{\mathscr{F}^2}$ with the two-element family $\mathscr{F}^2$ of inductive nonempty subsets of $\omega$
Oleg Gutik, Marko Serivka
https://arxiv.org/abs/2506.18837

On the semigroup of endomorphisms of the semigroup $\boldsymbol{B}_ω^{\mathscr{F}^2}$ with the two-element family $\mathscr{F}^2$ of inductive nonempty subsets of $ω$
We study the semigroup $\overline{\boldsymbol{End}}(\boldsymbol{B}_ω^{\mathscr{F}^2})$ of all endomorphisms of the bicyclic extension $\boldsymbol{B}_ω^{\mathscr{F}^2}$ with the two-element family $\mathscr{F}^2$ of inductive nonempty subsets of $ω$. The submonoid $\left\langle\varpi\right\rangle^1$ of $\overline{\boldsymbol{End}}(\boldsymbol{B}_ω^{\mathscr{F}^2})$ with the property that every element of the semigroup $\overline{\boldsymbol{End}}(\boldsymbol{B}_ω^{\mathscr{F}^2})$ has the …

A pseudometric on $\mathcal{M}(X,\mathscr{A})$ induced by a measure
Amrita Dey
https://arxiv.org/abs/2505.19780 https://arxiv.org/pdf…

A pseudometric on $\mathcal{M}(X,\mathscr{A})$ induced by a measure
For a probability measure space $(X,\mathscr{A},μ)$, we define a pseudometric $δ$ on the ring $\mathcal{M}(X,\mathscr{A})$ of real-valued measurable functions on $X$ as $δ(f,g)=μ(X\setminus Z(f-g))$ and denote the topological space induced by $δ$ as $\mathcal{M}_δ$. We examine several topological properties, such as connectedness, compactness, Lindelöfness, separability and second countability of this pseudometric space. We realise that the space is connected if and only if $μ$ is a non…

Unconventional high-harmonic generation in resonant membrane metasurfaces
Pavel Tonkaev, Felix Richter, Ivan Toftul, Maria Antonietta Vincenti, Ivan Sinev, Michael Scalora, Hatice Altug, Yuri Kivshar
https://arxiv.org/abs/2506.20873

Unconventional high-harmonic generation in resonant membrane metasurfaces
High-harmonic generation (HHG) in solids has rapidly emerged as a promising platform for creating compact attosecond sources and probing ultrafast electron dynamics. Resonant metasurfaces are essential for enhancement of the otherwise small harmonic generation efficiency through local field enhancement and are essential to circumvent the need of phase matching constraints. Until now, the metasurface-enhanced HHG was believed to follow the conventional integer-power scaling laws that hold for no…

Compact broadband thermal absorbers based on plasmonic fractal metasurfaces
Romil Audhkhasi, Virat Tara, Raymond Yu, Michelle L. Povinelli, Arka Majumdar
https://arxiv.org/abs/2506.20905

Compact broadband thermal absorbers based on plasmonic fractal metasurfaces
The ability to efficiently absorb thermal radiation within a small material volume is crucial for the realization of compact and high spatial resolution thermal imagers. Here we propose and experimentally demonstrate a compact plasmonic metasurface for broadband absorption in the 6 to 14 microns wavelength range. As opposed to previous works, our metasurface leverages strongly localized electromagnetic modes to achieve high absorption within a compact form factor. We numerically investigate the…

Don't leave for the weekend before you check out today's Metacurity for the most crucial infosec developments you should know, including
--Operation Checkmate seized the sites of BlackSuit ransomware operation,
--US sanctions three DPRK officials involved in worker schemes,
--AZ woman sentenced to 8 years for hosting DPRK laptop farm,
--Plankey promises to pitch for more CISA funding,
--UK student sentenced to 7 years for distributing phishing kits,

Operation Checkmate seized the BlackSuit ransomware sites
US sanctions three DPRK officials involved in worker schemes, AZ woman sentenced to 8+ years for hosting DPRK laptop farm, Plankey promises to pitch for more CISA funding, UK student sentenced to 7 years for distributing phishing kits, Hackers stole info from CIA spy satellite arm, much more

Yikes, there is always so much infosec news but Metacurity helps a lot with the overload.
Check out today's issue for the cybersecurity developments you should know, including
--Cyber insurance premiums dropped for the first time in 2024,
--CyberAv3ngers shift to psychological manipulation,
--Another hacker hits Paraguay,
--50% of ransomware payments are less than expected,
--Pro-Russian group was reportedly behind Norwegian dam hack,
--UK 2025 …

Cyber insurance premiums dropped for the first time in 2024
CyberAv3ngers shift to psychological manipulation, Another hacker hits Paraguay, 50% of ransomware payments are less than expected, Pro-Russian group was reportedly behind Norwegian dam hack, UK 2025 strategy calls for stronger cyber capabilities, Hackers abuse Trezor's support form, much more