Blockchain

Why does switching to a private mempool still leave me open to sandwich attacks?

Peluang

Private and encrypted mempools now route more than half of Ethereum transactions, but encrypting a transaction does not hide everything a searcher needs. The trading pair, the direction of a swap, and a coarse size range can be inferred from surrounding chain state and timing metadata even when the transaction bytes are fully encrypted. A paper accepted at NeurIPS 2026 derives exact leakage thresholds at which this partial information remains sufficient to run a profitable sandwich attack against users who believe they are protected. The result is a false safety assumption: users opt into private relays and stop worrying, while searchers adapt their strategies to the residual signal that leaks through. There is no production tooling today that lets a user measure how much information their transaction leaks before they submit it, so the protection is unauditable.

Mengapa ini penting

Encryption is not privacy if the residual observable signal is enough to attack, and the first tool that quantifies per-transaction leakage turns privacy from a claim into a verifiable property.

Cara saya menilai peluang

Skor Peluang adalah penilaian pribadi saya, bukan pengukuran: seberapa besar dampaknya, seberapa sering terasa, dan seberapa sedikit solusi yang ada saat ini. Semakin tinggi skornya, semakin layak menurut saya untuk dibangun.

Tingkat Keparahan7/10

Seberapa besar masalah yang ditimbulkannya saat muncul.

Frekuensi8/10

Seberapa sering orang benar-benar menghadapinya.

Ruang Kosong9/10

Betapa sedikitnya alat yang baik tersedia untuknya saat ini.