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Edited ch04_keys.adoc with Atlas code editor

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@ -999,7 +999,7 @@ types of addresses to eliminate address collision attacks((("public key cryptogr
=== Bech32 Addresses === Bech32 Addresses
In 2017, the Bitcoin protocol was upgraded. When the upgrade is used, In 2017, the ((("public key cryptography", "bech32 addresses", "advantages of", id="pub-key-bech32-adv")))((("bech32 addresses", "advantages of", id="bech32-adv")))Bitcoin protocol was upgraded. When the upgrade is used,
it prevents transaction it prevents transaction
identifiers (txids) from being changed without the consent of a spending identifiers (txids) from being changed without the consent of a spending
user (or a quorum of signers when multiple signatures are required). user (or a quorum of signers when multiple signatures are required).
@ -1023,7 +1023,7 @@ getting all wallets to upgrade to new scripts with a new base58check
version was expected to require almost as much work as getting them to version was expected to require almost as much work as getting them to
upgrade to an entirely new address format, so several Bitcoin upgrade to an entirely new address format, so several Bitcoin
contributors set out to design the best possible address format. They contributors set out to design the best possible address format. They
identified several problems with base58check: identified several problems((("public key cryptography", "base58check encoding")))((("base58check encoding")))((("encoding", "base58check"))) with base58check:
- Its mixed-case presentation made it inconvenient to read aloud or - Its mixed-case presentation made it inconvenient to read aloud or
transcribe. Try reading one of the legacy addresses in this chapter transcribe. Try reading one of the legacy addresses in this chapter
@ -1103,7 +1103,7 @@ image::images/mbc3_0409.png["The same bech32 address QR encoded in lowercase and
and have that wallet remain able to spend to bech32 addresses for and have that wallet remain able to spend to bech32 addresses for
users of new features added in future protocol upgrades. It was users of new features added in future protocol upgrades. It was
hoped that we might never again need to go through the system-wide hoped that we might never again need to go through the system-wide
upgrade cycles necessary to allow people to fully use P2SH and segwit. upgrade cycles necessary to allow people to fully use P2SH and((("public key cryptography", "bech32 addresses", "advantages of", startref="pub-key-bech32-adv")))((("bech32 addresses", "advantages of", startref="bech32-adv"))) segwit.
==== Problems with Bech32 Addresses ==== Problems with Bech32 Addresses