ECDSA-SHA256-secp256k1 https://github.com/bitcoin/bitcoin/tree/master/src/secp256k1
ECDSA-SHA256-secp256k1 https://github.com/ethereum/go-ethereum/tree/master/crypto/secp256k1
https://github.com/monero-project/monero
EdDSA-SHA512-Ed25519 https://github.com/monero-project/monero/blob/master/src/crypto/crypto_ops_builder/crypto_sign.h
https://wiki.hyperledger.org/projects/fabric.md
ECDSA-SHA256-P256 https://github.com/hyperledger/fabric/search?utf8=%E2%9C%93&q=ECDSA+elliptic&type=Code
Corda is a distributed ledger platform designed to record, manage and automate legal agreements between business partners. https://github.com/corda/corda
EdDSA-SHA512-Ed25519 https://github.com/corda/corda/search?utf8=%E2%9C%93&q=EdDSA
https://wiki.hyperledger.org/projects/iroha.md
EdDSA-SHA512-Ed25519 https://github.com/hyperledger/iroha-android/blob/master/iroha-android/src/main/java/io/soramitsu/irohaandroid/security/KeyGenerator.java
https://wiki.hyperledger.org/projects/sawtooth-lake.md
ECDSA-SHA256-secp256k1 https://github.com/hyperledger/sawtooth-core/blob/master/core/setup.cfg
A permissioned implementation of Ethereum supporting data privacy https://github.com/jpmorganchase/quorum
ECDSA-SHA256-secp256k1 https://github.com/jpmorganchase/quorum/blob/master/accounts/key.go
https://github.com/chain/chain
EdDSA-SHA512-ED25519 https://github.com/chain/chain/tree/main/crypto/ed25519
Dragonchain blockchain platform - simplified integration of advanced blockchain features https://github.com/dragonchain/dragonchain
ECDSA-SigningKey.from_pem dragonchain/dragonchain#55
ecdsa 0.13 : Python Package Index https://pypi.python.org/pypi/ecdsa/
Smart Contracts Running on a BFT Hardened Raft https://github.com/kadena-io/juno
EdDSA-SHA512-Ed25519 https://github.com/kadena-io/juno/blob/develop/src/Juno/Types/Base.hs
yeasy/blockchain_guide: A book to introduce blockchain related techniques. https://github.com/yeasy/blockchain_guide
Low-level Cryptography Specification - I2P https://geti2p.net/spec/cryptography