Edited ch08_signatures.adoc with Atlas code editor

ch08_signatures.adoc

@@ -90,7 +90,7 @@ signature on this transaction."
 [[sighash_types]]
 ==== Signature Hash Types (SIGHASH)
 
-Digital signatures apply to messages,
+Digital signatures((("digital signatures", "SIGHASH flags", id="digital-signature-sighash")))((("SIGHASH flags", id="sighash"))) apply to messages,
 which in the case of Bitcoin, are the transactions themselves. The
 signature prove a _commitment_ by the signer to specific transaction
 data. In the simplest form, the signature applies to almost the entire
@@ -277,7 +277,7 @@ wallet application.  Simple wallet applications
 sign with [.keep-together]#+SIGHASH_ALL+# flags.  More sophisticated applications, such as
 Lightning Network nodes, may use alternative +SIGHASH+ flags, but they
 use protocols that have been extensively reviewed to understand the
-influence of the alternative flags.
+influence of the alternative ((("digital signatures", "SIGHASH flags", startref="digital-signature-sighash")))((("SIGHASH flags", startref="sighash")))flags.
 ====
 
 [[schnorr_signatures]]