Rancangan Shielded Bitcoin (BTC) Para Peneliti Mengakali Transfer Privat pada 700 Byte

COINOTAG - FASTEST CRYPTO NEWS · 2026-09-26T04:39:33.000Z

• Peneliti mengusulkan Shielded Bitcoin dengan catatan terenkripsi bergaya Zcash di Bitcoin • Transfer privat diperkirakan 700 byte virtual, sekitar empat kali biaya normal • Kerugian peretasan Bitget direvisi hingga $387,5 juta pada aset XRP, Zcash, TRON Proposal Bitcoin (BTC) Tertutup Sekelompok kriptografer telah mengajukan rancangan untuk pembayaran Bitcoin (BTC) privat yang akan menyembunyikan jumlah, pengirim, dan penerima tanpa mengubah konsensus bukti kerja (proof-of-work) pada lapisan dasar. Spesifikasi Shielded Bitcoin setebal 56 halaman, yang diterbitkan pada Kamis oleh Clara Shikhelman, Mikhail Komarov, dan Aleksei Moskvin dari firma kriptografi [alloc] init, mengadaptasi arsitektur pembayaran tertutup di balik Zcash: nilai disimpan dalam catatan terenkripsi yang disebut notes, dan saat membelanjakan satu catatan, penerbitan dilakukan dengan memuat penanda (marker) sekaligus bukti matematis bahwa pengirim memiliki dana tersebut dan tidak menciptakan pasokan baru. Berbeda dari Zcash yang memverifikasi bukti tersebut sendiri, proposal ini menyimpan data transfer di Bitcoin dan menyerahkan verifikasi kepada perangkat lunak terpisah yang dapat dijalankan siapa pun — sehingga konfirmasi pada lapisan dasar bisa terjadi bahkan ketika pembayaran privat di dalamnya gagal melewati pemeriksaan sendiri. Para penulis memperkirakan transfer privat sekitar 700 byte virtual dibanding 100–200 untuk transaksi normal, sekitar empat kali biaya penambang pada tingkat biaya yang sama. Belum ada mekanisme setoran atau penarikan — yang dijadwalkan untuk makalah lanjutan menggunakan PIPEs, sebuah teknik untuk mengunci kunci penandatanganan Bitcoin hingga kondisi tertentu terpenuhi — artinya, pengguna pada masa interim secara efektif akan memegang bitcoin terbungkus (wrapped) atau sintetis. Hingga Jumat, belum ada tanggal peluncuran.

• Researchers propose Shielded Bitcoin using Zcash-style encrypted notes on Bitcoin
• Private transfers estimated at 700 virtual bytes, about four times normal fees
• Bitget hack losses revised up to $387.5M across XRP, Zcash, TRON assets
Shielded Bitcoin (BTC) Proposal
A team of cryptographers has put forward a design for private Bitcoin (BTC) payments that would hide amounts, senders and recipients without altering the base layer's proof-of-work consensus. The 56-page Shielded Bitcoin specification, published Thursday by Clara Shikhelman, Mikhail Komarov and Aleksei Moskvin of cryptography firm [alloc] init, adapts the shielded-payment architecture behind Zcash: value sits in encrypted records called notes, and spending one publishes a marker plus a mathematical proof that the sender owned the funds and created no new supply. Unlike Zcash, which verifies such proofs itself, the proposal stores transfer data on Bitcoin and leaves verification to separate software anyone can run — so a base-layer confirmation could land even when the private payment inside it fails its own checks. The authors estimate a private transfer at roughly 700 virtual bytes versus 100-200 for a normal transaction, about four times the miner fee at an equal fee rate. No deposit or withdrawal mechanism exists yet — that is reserved for a follow-up paper using PIPEs, a technique to lock a Bitcoin signing key until set conditions are met — meaning users would effectively hold wrapped or synthetic bitcoin in the interim. There is no launch date as of Friday.
Bitget's $387.5M Hot-Wallet Breach
Custody risk resurfaced hours after the paper appeared. Bitget's security systems flagged unauthorized transfers from a subset of hot wallets at 02:31 UTC+8 on September 25, and the exchange's official updates now put the drained total at roughly $387.5 million — revised up from an initial $351.6 million estimate after previously uncounted Zcash and TRON assets were added, not because of fresh theft. Attackers compromised the wallet service's backend, forged transfer instructions and triggered the authorized signing flow; private-key leakage has been ruled out, and cold wallets were untouched. Withdrawals stay paused while deposits and trading run normally, and balances are covered by a protection fund the exchange sizes above $464 million, backed by more than $1 billion of its own capital. Mandiant and SlowMist lead the investigation, a 5% bounty is offered for frozen or recovered funds, and a withdrawal-resumption plan was due by 12:00 Beijing time on September 26. On-chain tracing has already linked stolen XRP to July's $24 million AFX hack, attributed to TraderTraitor, pointing investigators toward Lazarus Group. As our best crypto exchanges guide stresses, platform custody remains a counterparty decision users should weigh deliberately.
BTC Steady Near $84,000
Price action stayed muted through all of this. Bitcoin changed hands near $83,924, down 0.33%, as of 13:00 Korea time on September 26, with 24-hour volume near $32.45 billion, down 11.71% — both sides of the book pulled back. The five-session tape shows four small down days out of five, yet daily and weekly MACD readings remain positive, so the medium-term trend has not flipped bearish. Under the surface, participation improved: active wallets rose to 671,438 from 638,874 a day earlier, and exchanges recorded net outflows of 7,407 BTC versus 3,632 the prior session, easing near-term sell pressure. Fear and Greed printed 74, up from 71, even as Google Trends interest cooled to 39 from 58. SOPR at 1.0076 shows sellers still realizing only modest profits. The weekly picture is stronger: BTC/JPY closed the September 13-19 week up 7.08% at ¥12,714,550 per SBI VC Trade's weekly market report, after a short squeeze followed the Fed and Senate event gauntlet. Positioning trackers matter here too — CoinMarketCap's acquisition of Coinglass consolidated Bitcoin derivatives data from 28 exchanges — and our Bitcoin market coverage tracks those flows daily.
CLARITY Stalls, Fed Hikes
The week's risk-off start and sharp rebound trace back to Washington. On September 15 the Senate fell 49-50 short of the 60 votes needed to bring the CLARITY Act — a comprehensive digital-asset market-structure bill — into full-chamber debate; Democratic senators opposed unanimously, with the fight centering on ethics language that excluded businesses tied to the president's children, including World Liberty Financial. Bitcoin slid to near $75,000 around the vote before buyers returned. The bill is not dead: a reconsideration motion is on file and some lawmakers eye a post-midterm lame-duck session, but most market participants now expect passage to slip to the 2027 Congress. In the vacuum, regulators acted alone: the SEC released a five-year innovation exemption on September 17 for on-chain trading of tokenized equities, and its Regulation Crypto Assets proposal stays open for comment until October 20 — while the CFTC's stance is detailed in our FAQ on tokenized customer funds. The FOMC then delivered a widely expected 25-basis-point hike to 3.75-4.00% on a unanimous 12-0 vote, with 16 of 19 policymakers projecting at least one more increase this year, clearing the event calendar and fueling the recovery rally.
Privacy Is Now the Battleground
COINOTAG's read: three threads — private payments, exchange custody and rulemaking — are converging on one question of who can see what. The strongest evidence sits on-chain and in primary documents: attacker-controlled addresses demonstrably hold the $387.5 million moved out of Bitget, and the exchange's own post-incident statement confirms the attack path was identified and the underlying vulnerability patched, with root cause traced to a compromised backend signing workflow rather than key theft. On policy, SEC Commissioner Hester Peirce argued in remarks at SIFMA's digital assets conference that compliance should lean on zero-knowledge proofs rather than ever-larger data haystacks — the same cryptography Shielded Bitcoin proposes. If base-layer privacy and self-custody both advance, exchange counterparty risk becomes a choice, not a default.