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Morning digest: October 17, 2026

Anthropic says its AI model Claude solved one of cryptography’s oldest puzzles: it worked out where the NSA got the unexplained seeds behind the NIST elliptic curves, including P-256, which secures much of the web, and the answer makes a hidden backdoor much less plausible. Post-quantum work kept moving: a new method bundles thousands of post-quantum signatures into one small proof, and nine firms formed a quantum-readiness standards group. In Washington, President Trump waived almost all of the new Graham Act Russia sanctions and tariffs two days before they were due, and existing sanctions are unchanged. Health leads with trained athletes adding blood-flow-restriction intervals, caffeine and velocity-based squats. All six Prince William early-voting sites open tomorrow, Sunday, Oct. 18. Moscow says it downed 144 drones overnight and restricted its airports again; Voronezh region reports no damage.

Blockchain: the NIST curve mystery is solved, post-quantum work speeds up, Coinbase backs Marqeta’s stablecoin cards

Claude found where the NIST curve seeds came from, and it argues against a backdoor. For 25 years nobody could explain the “seeds” the NSA used to generate the NIST P-192 through P-521 curves, including P-256, which secures much of the web and many bank and enterprise signing systems. Anthropic says an internal research model solved it in under half an hour. The seeds were not hashes of a secret phrase, as long rumored, but plain output of the old C random-number generator lrand48, started from Unix timestamps between May 1997 and April 1998; P-256 came out after 1,842 iterations. Claude recovered the generator’s hidden state with a textbook lattice technique. Cryptographer Filippo Valsorda, who organized a bounty for the seeds, calculates that even under generous assumptions the NSA would have had barely 30 bits of freedom, not enough to target weak curves or plant a backdoor. It is not an attack or a weakness, so nobody needs to change anything. Bitcoin and Ethereum use a different curve, secp256k1, and were never part of the question (Anthropic; Filippo Valsorda; CoinDesk).

Aerie bundles post-quantum signatures into one small proof. Post-quantum signatures are 10 to 30 times bigger than today’s, a real obstacle for blockchains where thousands of validators sign every block. Researchers from LayerZero Labs, a16z crypto research, Carnegie Mellon and Imperial College London report aggregating 32,768 Falcon signatures (the lattice scheme NIST is standardizing as FN-DSA) in 0.65 seconds on an M4 Max MacBook Pro with no GPU. That works out to about 42 bytes per signature, and the bundle verifies in 54 ms. a16z says that is about 29 times faster than Ethereum’s leanVM approach for consensus signatures. It is a research result, not a deployed upgrade, but it makes post-quantum consensus look practical on ordinary hardware (paper; LayerZero; a16z crypto).

Nine crypto firms launched the Quantum Alliance to define what “quantum-resistant” should mean for chains, wallets and custody, and how to test those claims. Members include Hacken, Midnight Foundation, Quantus, Keystone and Abelian, and working groups cover chain migration, post-quantum zero-knowledge proofs, wallet security and cross-chain compatibility. The alliance estimates that about 6.4M BTC, around 30% of supply, sit at addresses whose public keys are already exposed; that is its own estimate. Members disagree on timing (one says 2028, others won’t name a date) and on whether vulnerable coins should be frozen. The launch signals coordination, not an imminent attack (GlobeNewswire; CoinDesk).

Ethereum’s Glamsterdam upgrade goes to the Hoodi testnet on Oct. 26 (17:42 UTC), after Sepolia on Oct. 6, and Hoodi’s gas limit rises to 200M at the same time. The headline change is enshrined proposer-builder separation: the protocol itself, not outside relays, will handle the handoff between validators who propose blocks and the specialist builders who assemble them. It also adds block-level access lists, which declare up front what state a block touches so clients can process transactions in parallel, and gas repricing that better tracks real costs. Hoodi is the last public testnet before mainnet, but no mainnet date has been set (Ethereum Foundation).

Coinbase will power stablecoin-backed cards for Marqeta’s clients. A day after Mastercard named Marqeta an early partner for its stablecoin platform, Coinbase said it will hold customers’ stablecoins and convert them to fiat at the point of sale, while Marqeta issues and processes the cards. Settlement is planned on Base, Coinbase’s Ethereum layer 2, and businesses can fund card programs around the clock. It is a collaboration announcement: no fees, launch date or supported stablecoins yet (Marqeta; The Block).

Circle opened its books and plans to enter about 40 emerging markets. The USDC issuer says it brought in about $1.4B in revenue in the first half of 2026. Of that, $819M went to distribution partners such as Coinbase and to transaction costs, $473M went back into infrastructure and compliance, and roughly 7 cents per dollar was left as net profit. That is a direct answer to newer issuers who say incumbents keep too much of the reserve income. Circle also says USDC carried about 77% of global stablecoin transaction volume in June. Separately, CEO Jeremy Allaire told Reuters that Circle will expand into Southeast Asia, Latin America, Africa and the Middle East, backed by its $400M Tazapay acquisition, ahead of the GENIUS Act taking effect in January (The Block; Decrypt).

Briefly:

Deutsche Bank received its MiCA license from BaFin, according to ESMA’s interim register. It plans crypto custody in Germany first, starting with BTC, ETH, USDC, EURC and AllUnity’s EURAU and built with Taurus, then Asian financial centers in 2027 (Cointelegraph).
Bitget, which lost about $388M in a September breach, will stop serving “some users” in a one-off exercise; affected customers get direct notices with withdrawal deadlines. It didn’t say who or why. Watch for phishing that imitates these notices (Cointelegraph).
At the IMF meetings, ECB President Christine Lagarde said the digital euro is being prepared to sit alongside cash for everyday payments, calling it key to Europe’s “strategic autonomy in payments” (Cointelegraph).
Markets: bitcoin held near $82,000 after Fed Chair Warsh gave no hint of a hike, then slipped to about $81,000 Friday as an oil-price spike pushed the Nasdaq down more than 2% (Cointelegraph).
No new Swift shared-ledger news. The Ethereum Foundation and LayerZero items are covered above.

Health: trained athletes add BFR, caffeine and velocity feedback

Four of today’s studies used trained athletes, but the three that report ages involve teenagers and university students, so carry-over to adult or masters athletes isn’t tested. The cognitive items, and both diabetes studies, come from general or clinical populations and are labeled as such.

Light blood-flow-restriction intervals beat HIIT for strength in trained teen cyclists, and more of the gain lasted. In a 4-week trial, 40 recreationally trained male cyclists (mean age 14.5) did three supervised sessions a week. One group rode intervals at about 40% of peak power (60–75% of max heart rate) with thigh cuffs at 50% of arterial occlusion pressure. The other rode HIIT at about 85% of peak power (85–95% of max heart rate) with no cuffs. Peak torque rose 21.5 N·m with BFR versus 9.3 N·m with HIIT, and after 2 weeks off, 78% of the BFR gain remained versus 64%. The lever: for an already-trained athlete, cuffs can buy strength from low-intensity riding, which could help on recovery days or when coming back from injury. Limits: strength and neuromuscular outcomes only, no VO2max or race results; the two programs weren’t matched for total work; there was no non-training control; small sample of boys (Sport Sciences for Health).

Caffeine sharpened explosive power and reactions in taekwondo athletes, not endurance. A meta-analysis of placebo-controlled trials found caffeine improved explosive performance (Hedges’ g 0.40, moderate certainty), reaction agility (g 1.43) and technical accuracy (g 1.05), the last two at low certainty. It did nothing for endurance (g 0.10). Doses and timing varied, so there is no tested dose to copy, and the abstract doesn’t say how many trials or athletes were pooled. The lever is to use caffeine for skill-and-speed sessions, not long efforts (Metabolites).

Velocity-based squats added about 14 kg more to 1RM in kendo athletes. Over 7 weeks, 12 university kendo athletes trained back squats either by bar speed (velocity-based, 7 athletes) or by fixed percentages of 1RM (5 athletes). Both groups got stronger, but the velocity group gained 14.1 kg more on 1RM (95% CI 4.5–23.8). Rate of force development leaned their way but wasn’t clear, and strike speed didn’t change. Limits: very small; groups were split by academic year, not randomized; load progression also differed, so the gain can’t be credited to velocity feedback alone (Human Movement).

Core work mostly improves balance and core endurance in young athletes. A meta-analysis of 31 controlled trials (818 trained athletes aged 10–19) found that core programs added to normal training improved jumps, sprints of 20 m or more, change of direction, balance and core endurance. Results for short sprints of 10 m or less were inconclusive, and the benefits were most consistent for balance and core outcomes. Certainty was moderate to very low, and some trials weren’t randomized (Scientific Reports).

Brain and mind levers, from general populations:

Going to performances or exhibitions every few months or more tracked with 29% lower dementia risk. In the English Longitudinal Study of Ageing (8,274 adults over 50, followed up to 20 years through hospital records), frequent attendance versus never went with lower risk of dementia (HR 0.71, 95% CI 0.56–0.89), mood disorders (HR 0.73) and substance misuse (HR 0.75). The links held after excluding early cases and adjusting for baseline cognition and depression, and there was no link to unrelated “control” outcomes such as eye disease. It is a cheap habit to stack on top of exercise, but the study is observational, with self-reported attendance, so wealth or health could still explain part of it (JAMA Network Open).
Any structured exercise program gave a moderate boost to executive function. A meta-analysis of 47 RCTs (4,195 healthy children, teens and older adults) found an average gain of g 0.41, with positive estimates for inhibition, working memory and mental flexibility. No program type stood out: complex, coordination-heavy or “cognitively enriched” exercise did no better than plain training. Certainty is low and results varied widely, so some programs may do nothing (Frontiers in Psychology).

Also new, from clinical populations:

Evening exercise did more for arteries than morning exercise in older adults with type 2 diabetes. In a 12-week RCT (66 randomized, 58 analyzed), both 7–8 p.m. and 9–10 a.m. sessions of aerobic plus resistance training, 70 minutes three times a week, improved blood-vessel function and blood pressure. Only the evening group raised nitric oxide and beat controls on mean arterial pressure and vessel dilation, and it cut arterial stiffness more than the morning group. That comparison was exploratory, and the abstract gives p-values rather than effect sizes (Frontiers in Endocrinology).
In adults with diabetes, longer and more frequent activity tracked with lower mortality. In the Mexico City Prospective Study (28,573 adults with diabetes, followed about 15 years), three or more sessions a week went with 11% lower all-cause mortality (HR 0.89), and sessions over 60 minutes with 17% lower (HR 0.83), compared with the low categories. High overall volume went with 18% lower cardiovascular mortality. These are self-reported, observational associations in a diabetic population and don’t justify changing a healthy adult’s training (Scientific Reports).

General and local

Trump waived almost all of the Graham Act Russia sanctions and tariffs. On Friday, two days before the law’s penalties were due to take effect on Oct. 18, the President signed an order that sets the law’s tariffs on paper (+500% on Russian goods and +100% on goods from the top five buyers of Russian oil and gas) and then waives all of them, along with most of the law’s sanctions. The waivers last until the President or the Secretary of State decides otherwise. ABC News says the order “effectively neutralizes” the law, including the provisions that barred the president from lifting Russia sanctions. The order states that existing Russia sanctions under the earlier executive orders stay in place. In practice, current rules on transfers, banks and payments to Russia don’t change: no new restrictions and no relief. OFAC’s only action Friday was Venezuela-related (White House; ABC News).

The odds of an October Fed hike fell to about 15%. At an IMF event in Bangkok, Chair Warsh said he wasn’t signaling a decision either way and that “the world has broadly conformed to our expectations” since September. Futures priced about a 15% chance of a hike at the Oct. 28 meeting, down from about 30% earlier in the week. CNBC cautions that Warsh rejects forward guidance and could still push for a hike with CPI at 3.7% and PPI at 6.3% (CNBC). Industrial production rose 0.7% in September, beating the 0.4% forecast; utilities jumped 3.5% in a record-warm month, and manufacturing rose 0.3% (Federal Reserve; KPMG). September housing starts come out Oct. 20.

Gas edged down, diesel rose again. AAA has Virginia regular at $4.086, down from $4.187 a week ago, against a national average of $4.309. Virginia diesel rose to $6.266, close to its Sept. 22 record of $6.388. In the Northern Virginia metro, regular is $4.156 and diesel $6.367 (AAA).

Prince William County and Manassas: All six early-voting sites open tomorrow, Sunday, Oct. 18, from 11 a.m. to 5 p.m.: the Office of Elections (9250 Lee Ave., Manassas), the AJ Ferlazzo Building (15941 Donald Curtis Dr., Woodbridge), Brentsville Courthouse (12229 Bristow Rd., Bristow), the Woodbridge DMV (2731 Caton Hill Rd.), Dumfries Community Center (17757 Main St.) and the Haymarket Gainesville Library (14870 Lightner Rd.). From then through Oct. 31 they are open weekdays 8:30 a.m.–4:30 p.m. (until 7 p.m. Wednesdays), Sunday Oct. 25 from 11 a.m. to 5 p.m., and Saturdays Oct. 24 and 31 from 8:30 a.m. to 5 p.m. Turnout reached 29,951 (8.91% of registered voters) through Oct. 16: 16,360 early in-person voters and 13,591 returned mail ballots. The deadline to request a mail ballot or update your registration is Friday, Oct. 23 (PWC Votes). Sen. Danica Roem (D-Prince William) is co-sponsoring SB 843 with Sen. Russet Perry (D-Loudoun); it would bar localities, DEQ and the SCC from approving data-center permits statewide from July 2027 to July 2030, and Del. Irene Shin (D-Fairfax) has a related House bill. Both go to the January session and would directly hit the county’s data-center pipeline (Prince William Times). The Planning Commission unanimously recommended the Lumina rezoning, about 250 townhomes on 35 acres along U.S. 15 outside Haymarket, which would add about 99 students to Haymarket Elementary, Reagan Middle and Gainesville High, all already over capacity; the Board of Supervisors still has to vote (Prince William Times). Police charged two Occoquan Elementary staff members after a 5-year-old climbed a fence and crossed Old Bridge Road on Oct. 7; the child was unharmed, and both are on leave (Patch). The Board of Supervisors meets Oct. 20, and there is still no published outcome from the Oct. 13 tax-policy work session.

Fairfax County: The Board unanimously approved Peterson Companies’ revised MetroWest Building 18 near the Vienna Metro, raising it from 244 to 269 units and from 105 to 114 feet. The plan includes 27 affordable units and 21,500 square feet of retail, including a daycare for 150 children, with no increase in MetroWest’s overall unit cap (FFXnow). Early in-person voting runs through Oct. 31, and the mail-ballot and registration deadline is also Oct. 23. The next full Board meeting is Oct. 27.

Russia: 144 drones over Moscow, airports restricted; Voronezh unharmed

Mayor Sobyanin reported 144 drones headed for Moscow downed between 00:35 and 06:41 Moscow time on Oct. 17; he did not report casualties. Moscow airports restricted flights again from shortly before midnight, after repeated shutdowns earlier this week. In Voronezh region, Gov. Gusev said 14 drones were downed over one Voronezh city district and two districts of the region, with no casualties or damage by preliminary data; the all-clear came at 7:24 a.m. local time (Vedomosti; Ukrinform; TV Gubernia).

Bottom line

Cryptography got good news: the NIST curves look clean, and post-quantum signatures are getting small and fast enough for blockchains, while the industry is still arguing over how fast it needs to move. Money transfers to Russia face no new US restrictions, since the Graham Act penalties were waived and existing sanctions stay as they are. An October Fed hike now looks unlikely, but it isn’t ruled out, and diesel is close to its record. In Health, the uncommon lever worth noting is light blood-flow-restriction riding for already-trained athletes, with regular arts outings as a cheap habit for the brain. Prince William’s six early-voting sites open tomorrow from 11 to 5. If family is flying through Moscow, plan around overnight airport closures.