HKDF seems to be the better approach to derive symmetric cipher keys from the ECDH shared secret.
Discussion: https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2016-July/012878.html
[BIP151] Switch from plain HMAC_SHA512 KDF to HKDF #418
pull jonasschnelli wants to merge 1 commits into bitcoin:master from jonasschnelli:2016/07/bip151_hkdf changing 1 files +19 −13-
jonasschnelli commented at 10:07 AM on July 15, 2016: contributor
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[BIP151] Switch from plain HMAC_SHA512 KDF to HKDF 529c7cddb7
- luke-jr merged this on Jul 15, 2016
- luke-jr closed this on Jul 15, 2016
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