# \#address

**URL:** https://delvingbitcoin.org/tag/address/16.md

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## [PQ-single-address-backup - BIP-38 for P2MR (bc1z) - 104-char encrypted backup format](https://delvingbitcoin.org/t/pq-single-address-backup-bip-38-for-p2mr-bc1z-104-char-encrypted-backup-format/2767)

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**Author:** [@coldtest-berlin](https://delvingbitcoin.org/u/coldtest-berlin)\
**Replies:** 8\
**Last updated:** [August 23, 2026, 8:57am UTC](https://delvingbitcoin.org/t/pq-single-address-backup-bip-38-for-p2mr-bc1z-104-char-encrypted-backup-format/2767 "2026-08-23T08:57:28Z")

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After discussion on P2MR / BIP-360 (bc1z), one open question remains: how to safely store a 32-byte SLH-DSA seed offline for cold storage / inheritance. Storing 64 hex in plain text is not safe - one copy, fire/theft = …

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## [Revisiting BIP21](https://delvingbitcoin.org/t/revisiting-bip21/630)

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**Author:** [@josibake](https://delvingbitcoin.org/u/josibake)\
**Replies:** 19\
**Last updated:** [May 9, 2024, 9:18am UTC](https://delvingbitcoin.org/t/revisiting-bip21/630 "2024-05-09T09:18:52Z")

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Recently had a discussion on BIP352 regarding specifying a BIP21 extension for silent payment addresses and I felt it would be better to open this as a broader topic since its not BIP352 specific and this also came up in…