{"document_id":"BLC-STUDY-0236","slug":"bip-85","title":"Deterministic Entropy From BIP32 Keychains","authors":"Ethan Kosakovsky","year":2020,"date_label":"2020","publisher":"Ethan Kosakovsky","paper_type":"Design paper","category":"Privacy","topics":["Privacy"],"source_url":"https://bips.dev/85","source_label":"BIP 85","legacy_pdf_path":null,"sha256":null,"sha256_note":"No hash is published. This build does not store those PDF bytes, so a checksum would be invented. Where a legacy path exists, it points at the Internet Archive copy of the old library.","version":"Source cited by the 2020 study. The study is the reading. This page does not add a second essay.","doi":null,"rights_status":"Official external source only","source_status":"Official source","use_status":"Metadata and commentary only. The reading is the study page.","licence":null,"licence_label":"No licence recorded. Rights status under review.","full_text":null,"full_text_reason":"Full text is not published on this page. Public availability is not a licence to republish a document. Blockchain Lab has not recorded a licence that permits an HTML transcription, a training set, or a retrieval corpus of the paper. Text on this page is Blockchain Lab's own wording, or a pointer to a study that is also Blockchain Lab's wording.","editorial_line":"BIP 85, Deterministic Entropy From BIP32 Keychains. ''\"One Seed to rule them all,'' ''One Key to find them,'' ''One Path to bring them all,'' ''And in cryptography bind them.\"'' It is not possible to maintain one single (mnemonic) seed backup for all keychains used across various wallets because there are a variety of incompatible standards.","canonical_url":"https://blockchainlab.com/whitepaper/bip-85","record_url":"https://blockchainlab.com/research/corpus/papers/bip-85","study_url":"https://blockchainlab.com/whitepaper/bip-85","last_reviewed":"2026-10-01","last_checked":"2026-10-01","relationships":[{"rel":"Canonical reading","label":"BIP 85 study","href":"/whitepaper/bip-85"},{"rel":"Related paper","label":"Groth16","href":"/whitepaper/groth16"},{"rel":"Related paper","label":"Bulletproofs","href":"/whitepaper/bulletproofs"},{"rel":"Related paper","label":"Taproot","href":"/whitepaper/taproot"}]}