diff --git a/ethchain/block.go b/ethchain/block.go
index fee4a2d59..ed5b754f8 100644
--- a/ethchain/block.go
+++ b/ethchain/block.go
@@ -3,6 +3,8 @@ package ethchain
 import (
 	"bytes"
 	"fmt"
+	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 	"strconv"
@@ -102,18 +104,18 @@ func CreateBlock(root interface{},
 	}
 	block.SetUncles([]*Block{})
 
-	block.state = NewState(ethutil.NewTrie(ethutil.Config.Db, root))
+	block.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, root))
 
 	return block
 }
 
 // Returns a hash of the block
 func (block *Block) Hash() []byte {
-	return ethutil.Sha3Bin(block.Value().Encode())
+	return ethcrypto.Sha3Bin(block.Value().Encode())
 }
 
 func (block *Block) HashNoNonce() []byte {
-	return ethutil.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash,
+	return ethcrypto.Sha3Bin(ethutil.Encode([]interface{}{block.PrevHash,
 		block.UncleSha, block.Coinbase, block.state.trie.Root,
 		block.TxSha, block.Difficulty, block.Number, block.MinGasPrice,
 		block.GasLimit, block.GasUsed, block.Time, block.Extra}))
@@ -239,7 +241,7 @@ func (block *Block) SetUncles(uncles []*Block) {
 	block.Uncles = uncles
 
 	// Sha of the concatenated uncles
-	block.UncleSha = ethutil.Sha3Bin(ethutil.Encode(block.rlpUncles()))
+	block.UncleSha = ethcrypto.Sha3Bin(ethutil.Encode(block.rlpUncles()))
 }
 
 func (self *Block) SetReceipts(receipts []*Receipt, txs []*Transaction) {
@@ -250,7 +252,7 @@ func (self *Block) SetReceipts(receipts []*Receipt, txs []*Transaction) {
 func (block *Block) setTransactions(txs []*Transaction) {
 	block.transactions = txs
 
-	trie := ethutil.NewTrie(ethutil.Config.Db, "")
+	trie := ethtrie.NewTrie(ethutil.Config.Db, "")
 	for i, tx := range txs {
 		trie.Update(strconv.Itoa(i), string(tx.RlpEncode()))
 	}
@@ -287,7 +289,7 @@ func (block *Block) RlpValueDecode(decoder *ethutil.Value) {
 	block.PrevHash = header.Get(0).Bytes()
 	block.UncleSha = header.Get(1).Bytes()
 	block.Coinbase = header.Get(2).Bytes()
-	block.state = NewState(ethutil.NewTrie(ethutil.Config.Db, header.Get(3).Val))
+	block.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, header.Get(3).Val))
 	block.TxSha = header.Get(4).Bytes()
 	block.Difficulty = header.Get(5).BigInt()
 	block.Number = header.Get(6).BigInt()
@@ -329,7 +331,7 @@ func NewUncleBlockFromValue(header *ethutil.Value) *Block {
 	block.PrevHash = header.Get(0).Bytes()
 	block.UncleSha = header.Get(1).Bytes()
 	block.Coinbase = header.Get(2).Bytes()
-	block.state = NewState(ethutil.NewTrie(ethutil.Config.Db, header.Get(3).Val))
+	block.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, header.Get(3).Val))
 	block.TxSha = header.Get(4).Bytes()
 	block.Difficulty = header.Get(5).BigInt()
 	block.Number = header.Get(6).BigInt()
diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go
index 6e4c72b27..7a481ed7c 100644
--- a/ethchain/block_chain.go
+++ b/ethchain/block_chain.go
@@ -278,7 +278,7 @@ func AddTestNetFunds(block *Block) {
 		"e6716f9544a56c530d868e4bfbacb172315bdead",
 		"1a26338f0d905e295fccb71fa9ea849ffa12aaf4",
 	} {
-		codedAddr := ethutil.FromHex(addr)
+		codedAddr := ethutil.Hex2Bytes(addr)
 		account := block.state.GetAccount(codedAddr)
 		account.Amount = ethutil.Big("1606938044258990275541962092341162602522202993782792835301376") //ethutil.BigPow(2, 200)
 		block.state.UpdateStateObject(account)
diff --git a/ethchain/dagger.go b/ethchain/dagger.go
index 08c4826db..46b1081e9 100644
--- a/ethchain/dagger.go
+++ b/ethchain/dagger.go
@@ -1,6 +1,7 @@
 package ethchain
 
 import (
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/obscuren/sha3"
@@ -40,7 +41,7 @@ func (pow *EasyPow) Search(block *Block, reactChan chan ethutil.React) []byte {
 				powlogger.Infoln("Hashing @", int64(hashes), "khash")
 			}
 
-			sha := ethutil.Sha3Bin(big.NewInt(r.Int63()).Bytes())
+			sha := ethcrypto.Sha3Bin(big.NewInt(r.Int63()).Bytes())
 			if pow.Verify(hash, diff, sha) {
 				return sha
 			}
diff --git a/ethchain/genesis.go b/ethchain/genesis.go
index 359c47c26..54a3bc766 100644
--- a/ethchain/genesis.go
+++ b/ethchain/genesis.go
@@ -1,6 +1,7 @@
 package ethchain
 
 import (
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 )
@@ -11,13 +12,13 @@ import (
 
 var ZeroHash256 = make([]byte, 32)
 var ZeroHash160 = make([]byte, 20)
-var EmptyShaList = ethutil.Sha3Bin(ethutil.Encode([]interface{}{}))
+var EmptyShaList = ethcrypto.Sha3Bin(ethutil.Encode([]interface{}{}))
 
 var GenesisHeader = []interface{}{
 	// Previous hash (none)
 	ZeroHash256,
 	// Sha of uncles
-	ethutil.Sha3Bin(ethutil.Encode([]interface{}{})),
+	ethcrypto.Sha3Bin(ethutil.Encode([]interface{}{})),
 	// Coinbase
 	ZeroHash160,
 	// Root state
@@ -39,7 +40,7 @@ var GenesisHeader = []interface{}{
 	// Extra
 	nil,
 	// Nonce
-	ethutil.Sha3Bin(big.NewInt(42).Bytes()),
+	ethcrypto.Sha3Bin(big.NewInt(42).Bytes()),
 }
 
 var Genesis = []interface{}{GenesisHeader, []interface{}{}, []interface{}{}}
diff --git a/ethchain/state.go b/ethchain/state.go
index 4c66a973e..dc2d3c73b 100644
--- a/ethchain/state.go
+++ b/ethchain/state.go
@@ -1,6 +1,7 @@
 package ethchain
 
 import (
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
@@ -74,7 +75,7 @@ func (s *State) Purge() int {
 	return s.trie.NewIterator().Purge()
 }
 
-func (s *State) EachStorage(cb ethutil.EachCallback) {
+func (s *State) EachStorage(cb ethtrie.EachCallback) {
 	it := s.trie.NewIterator()
 	it.Each(cb)
 }
@@ -92,7 +93,7 @@ func (self *State) UpdateStateObject(stateObject *StateObject) {
 		self.stateObjects[string(addr)] = stateObject
 	}
 
-	ethutil.Config.Db.Put(ethutil.Sha3Bin(stateObject.Script()), stateObject.Script())
+	ethutil.Config.Db.Put(ethcrypto.Sha3Bin(stateObject.Script()), stateObject.Script())
 
 	self.trie.Update(string(addr), string(stateObject.RlpEncode()))
 
diff --git a/ethchain/state_manager.go b/ethchain/state_manager.go
index 312ba3084..f199e20ec 100644
--- a/ethchain/state_manager.go
+++ b/ethchain/state_manager.go
@@ -3,6 +3,7 @@ package ethchain
 import (
 	"bytes"
 	"container/list"
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
@@ -38,6 +39,7 @@ type EthManager interface {
 	IsMining() bool
 	IsListening() bool
 	Peers() *list.List
+	KeyManager() *ethcrypto.KeyManager
 }
 
 type StateManager struct {
@@ -293,7 +295,7 @@ func (sm *StateManager) ValidateBlock(block *Block) error {
 
 	// Verify the nonce of the block. Return an error if it's not valid
 	if !sm.Pow.Verify(block.HashNoNonce(), block.Difficulty, block.Nonce) {
-		return ValidationError("Block's nonce is invalid (= %v)", ethutil.Hex(block.Nonce))
+		return ValidationError("Block's nonce is invalid (= %v)", ethutil.Bytes2Hex(block.Nonce))
 	}
 
 	return nil
diff --git a/ethchain/state_object.go b/ethchain/state_object.go
index 480b4055d..e55540153 100644
--- a/ethchain/state_object.go
+++ b/ethchain/state_object.go
@@ -2,6 +2,8 @@ package ethchain
 
 import (
 	"fmt"
+	"github.com/ethereum/eth-go/ethcrypto"
+	"github.com/ethereum/eth-go/ethtrie"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 	"strings"
@@ -39,7 +41,7 @@ func MakeContract(tx *Transaction, state *State) *StateObject {
 
 		contract := state.NewStateObject(addr)
 		contract.initScript = tx.Data
-		contract.state = NewState(ethutil.NewTrie(ethutil.Config.Db, ""))
+		contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
 
 		return contract
 	}
@@ -53,7 +55,7 @@ func NewStateObject(addr []byte) *StateObject {
 
 func NewContract(address []byte, Amount *big.Int, root []byte) *StateObject {
 	contract := &StateObject{address: address, Amount: Amount, Nonce: 0}
-	contract.state = NewState(ethutil.NewTrie(ethutil.Config.Db, string(root)))
+	contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, string(root)))
 
 	return contract
 }
@@ -246,7 +248,7 @@ func (c *StateObject) RlpEncode() []byte {
 		root = ""
 	}
 
-	return ethutil.Encode([]interface{}{c.Nonce, c.Amount, root, ethutil.Sha3Bin(c.script)})
+	return ethutil.Encode([]interface{}{c.Nonce, c.Amount, root, ethcrypto.Sha3Bin(c.script)})
 }
 
 func (c *StateObject) RlpDecode(data []byte) {
@@ -254,7 +256,8 @@ func (c *StateObject) RlpDecode(data []byte) {
 
 	c.Nonce = decoder.Get(0).Uint()
 	c.Amount = decoder.Get(1).BigInt()
-	c.state = NewState(ethutil.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
+	c.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
+	c.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
 
 	c.ScriptHash = decoder.Get(3).Bytes()
 
diff --git a/ethchain/transaction.go b/ethchain/transaction.go
index 2ab681030..11f786b36 100644
--- a/ethchain/transaction.go
+++ b/ethchain/transaction.go
@@ -3,6 +3,7 @@ package ethchain
 import (
 	"bytes"
 	"fmt"
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/obscuren/secp256k1-go"
 	"math/big"
@@ -62,7 +63,7 @@ func (self *Transaction) TotalValue() *big.Int {
 func (tx *Transaction) Hash() []byte {
 	data := []interface{}{tx.Nonce, tx.GasPrice, tx.Gas, tx.Recipient, tx.Value, tx.Data}
 
-	return ethutil.Sha3Bin(ethutil.NewValue(data).Encode())
+	return ethcrypto.Sha3Bin(ethutil.NewValue(data).Encode())
 }
 
 func (tx *Transaction) CreatesContract() bool {
@@ -75,7 +76,7 @@ func (tx *Transaction) IsContract() bool {
 }
 
 func (tx *Transaction) CreationAddress() []byte {
-	return ethutil.Sha3Bin(ethutil.NewValue([]interface{}{tx.Sender(), tx.Nonce}).Encode())[12:]
+	return ethcrypto.Sha3Bin(ethutil.NewValue([]interface{}{tx.Sender(), tx.Nonce}).Encode())[12:]
 }
 
 func (tx *Transaction) Signature(key []byte) []byte {
@@ -111,7 +112,7 @@ func (tx *Transaction) Sender() []byte {
 		return nil
 	}
 
-	return ethutil.Sha3Bin(pubkey[1:])[12:]
+	return ethcrypto.Sha3Bin(pubkey[1:])[12:]
 }
 
 func (tx *Transaction) Sign(privk []byte) error {
diff --git a/ethchain/vm.go b/ethchain/vm.go
index 82591e274..66b5a9182 100644
--- a/ethchain/vm.go
+++ b/ethchain/vm.go
@@ -2,6 +2,7 @@ package ethchain
 
 import (
 	"fmt"
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"math"
@@ -398,7 +399,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 		case SHA3:
 			require(2)
 			size, offset := stack.Popn()
-			data := ethutil.Sha3Bin(mem.Get(offset.Int64(), size.Int64()))
+			data := ethcrypto.Sha3Bin(mem.Get(offset.Int64(), size.Int64()))
 
 			stack.Push(ethutil.BigD(data))
 			// 0x30 range
@@ -594,7 +595,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 			snapshot := vm.state.Copy()
 
 			// Generate a new address
-			addr := ethutil.CreateAddress(closure.caller.Address(), closure.caller.N())
+			addr := ethcrypto.CreateAddress(closure.caller.Address(), closure.caller.N())
 
 			vm.Printf(" (*) %x", addr).Endl()
 
diff --git a/ethereum.go b/ethereum.go
index a3df23e92..b78b0658f 100644
--- a/ethereum.go
+++ b/ethereum.go
@@ -4,7 +4,7 @@ import (
 	"container/list"
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
-	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethrpc"
 	"github.com/ethereum/eth-go/ethutil"
@@ -74,16 +74,15 @@ type Ethereum struct {
 	reactor *ethutil.ReactorEngine
 
 	RpcServer *ethrpc.JsonRpcServer
+
+	keyManager *ethcrypto.KeyManager
 }
 
-func New(caps Caps, usePnp bool) (*Ethereum, error) {
-	db, err := ethdb.NewLDBDatabase("database")
-	//db, err := ethdb.NewMemDatabase()
-	if err != nil {
-		return nil, err
-	}
+func New(db ethutil.Database, keyManager *ethcrypto.KeyManager, caps Caps, usePnp bool) (*Ethereum, error) {
 
+	var err error
 	var nat NAT
+
 	if usePnp {
 		nat, err = Discover()
 		if err != nil {
@@ -102,6 +101,7 @@ func New(caps Caps, usePnp bool) (*Ethereum, error) {
 		Nonce:        nonce,
 		serverCaps:   caps,
 		nat:          nat,
+		keyManager:   keyManager,
 	}
 	ethereum.reactor = ethutil.NewReactorEngine()
 
@@ -119,6 +119,10 @@ func (s *Ethereum) Reactor() *ethutil.ReactorEngine {
 	return s.reactor
 }
 
+func (s *Ethereum) KeyManager() *ethcrypto.KeyManager {
+	return s.keyManager
+}
+
 func (s *Ethereum) BlockChain() *ethchain.BlockChain {
 	return s.blockChain
 }
diff --git a/ethpub/pub.go b/ethpub/pub.go
index 1bc9e0ce7..cd30d0260 100644
--- a/ethpub/pub.go
+++ b/ethpub/pub.go
@@ -2,9 +2,9 @@ package ethpub
 
 import (
 	"bytes"
-	"encoding/hex"
 	"encoding/json"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
@@ -19,6 +19,7 @@ type PEthereum struct {
 	stateManager *ethchain.StateManager
 	blockChain   *ethchain.BlockChain
 	txPool       *ethchain.TxPool
+	keyManager   *ethcrypto.KeyManager
 }
 
 func NewPEthereum(manager ethchain.EthManager) *PEthereum {
@@ -27,24 +28,23 @@ func NewPEthereum(manager ethchain.EthManager) *PEthereum {
 		manager.StateManager(),
 		manager.BlockChain(),
 		manager.TxPool(),
+		manager.KeyManager(),
 	}
 }
 
 func (lib *PEthereum) GetBlock(hexHash string) *PBlock {
-	hash := ethutil.FromHex(hexHash)
+	hash := ethutil.Hex2Bytes(hexHash)
 	block := lib.blockChain.GetBlock(hash)
 
 	return NewPBlock(block)
 }
 
 func (lib *PEthereum) GetKey() *PKey {
-	keyPair := ethutil.GetKeyRing().Get(0)
-
-	return NewPKey(keyPair)
+	return NewPKey(lib.keyManager.KeyPair())
 }
 
 func (lib *PEthereum) GetStateObject(address string) *PStateObject {
-	stateObject := lib.stateManager.CurrentState().GetStateObject(ethutil.FromHex(address))
+	stateObject := lib.stateManager.CurrentState().GetStateObject(ethutil.Hex2Bytes(address))
 	if stateObject != nil {
 		return NewPStateObject(stateObject)
 	}
@@ -79,17 +79,13 @@ func (lib *PEthereum) GetIsListening() bool {
 }
 
 func (lib *PEthereum) GetCoinBase() string {
-	data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
-	keyRing := ethutil.NewValueFromBytes(data)
-	key := keyRing.Get(0).Bytes()
-
-	return lib.SecretToAddress(hex.EncodeToString(key))
+	return ethutil.Bytes2Hex(lib.keyManager.Address())
 }
 
 func (lib *PEthereum) GetTransactionsFor(address string, asJson bool) interface{} {
 	sBlk := lib.manager.BlockChain().LastBlockHash
 	blk := lib.manager.BlockChain().GetBlock(sBlk)
-	addr := []byte(ethutil.FromHex(address))
+	addr := []byte(ethutil.Hex2Bytes(address))
 
 	var txs []*PTx
 
@@ -129,12 +125,12 @@ func (lib *PEthereum) IsContract(address string) bool {
 }
 
 func (lib *PEthereum) SecretToAddress(key string) string {
-	pair, err := ethutil.NewKeyPairFromSec(ethutil.FromHex(key))
+	pair, err := ethcrypto.NewKeyPairFromSec(ethutil.Hex2Bytes(key))
 	if err != nil {
 		return ""
 	}
 
-	return ethutil.Hex(pair.Address())
+	return ethutil.Bytes2Hex(pair.Address())
 }
 
 func (lib *PEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) (*PReceipt, error) {
@@ -145,7 +141,7 @@ func (lib *PEthereum) Create(key, valueStr, gasStr, gasPriceStr, script string)
 	return lib.createTx(key, "", valueStr, gasStr, gasPriceStr, script)
 }
 
-var namereg = ethutil.FromHex("bb5f186604d057c1c5240ca2ae0f6430138ac010")
+var namereg = ethutil.Hex2Bytes("bb5f186604d057c1c5240ca2ae0f6430138ac010")
 
 func GetAddressFromNameReg(stateManager *ethchain.StateManager, name string) []byte {
 	recp := new(big.Int).SetBytes([]byte(name))
@@ -169,16 +165,16 @@ func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, sc
 		if len(addr) > 0 {
 			hash = addr
 		} else {
-			hash = ethutil.FromHex(recipient)
+			hash = ethutil.Hex2Bytes(recipient)
 		}
 	}
 
-	var keyPair *ethutil.KeyPair
+	var keyPair *ethcrypto.KeyPair
 	var err error
 	if key[0:2] == "0x" {
-		keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key[2:])))
+		keyPair, err = ethcrypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(key[2:])))
 	} else {
-		keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key)))
+		keyPair, err = ethcrypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(key)))
 	}
 
 	if err != nil {
@@ -194,7 +190,7 @@ func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, sc
 		var script []byte
 		var err error
 		if ethutil.IsHex(scriptStr) {
-			script = ethutil.FromHex(scriptStr)
+			script = ethutil.Hex2Bytes(scriptStr[2:])
 		} else {
 			script, err = ethutil.Compile(scriptStr)
 			if err != nil {
diff --git a/ethpub/types.go b/ethpub/types.go
index 0ced68ad1..05031dea2 100644
--- a/ethpub/types.go
+++ b/ethpub/types.go
@@ -1,10 +1,10 @@
 package ethpub
 
 import (
-	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethutil"
 	"strings"
 )
@@ -66,7 +66,7 @@ func NewPBlock(block *ethchain.Block) *PBlock {
 		return nil
 	}
 
-	return &PBlock{ref: block, Number: int(block.Number.Uint64()), GasUsed: block.GasUsed.String(), GasLimit: block.GasLimit.String(), Hash: ethutil.Hex(block.Hash()), Transactions: string(txJson), Time: block.Time, Coinbase: ethutil.Hex(block.Coinbase)}
+	return &PBlock{ref: block, Number: int(block.Number.Uint64()), GasUsed: block.GasUsed.String(), GasLimit: block.GasLimit.String(), Hash: ethutil.Bytes2Hex(block.Hash()), Transactions: string(txJson), Time: block.Time, Coinbase: ethutil.Bytes2Hex(block.Coinbase)}
 }
 
 func (self *PBlock) ToString() string {
@@ -78,7 +78,7 @@ func (self *PBlock) ToString() string {
 }
 
 func (self *PBlock) GetTransaction(hash string) *PTx {
-	tx := self.ref.GetTransaction(ethutil.FromHex(hash))
+	tx := self.ref.GetTransaction(ethutil.Hex2Bytes(hash))
 	if tx == nil {
 		return nil
 	}
@@ -103,22 +103,22 @@ type PTx struct {
 }
 
 func NewPTx(tx *ethchain.Transaction) *PTx {
-	hash := hex.EncodeToString(tx.Hash())
-	receiver := hex.EncodeToString(tx.Recipient)
+	hash := ethutil.Bytes2Hex(tx.Hash())
+	receiver := ethutil.Bytes2Hex(tx.Recipient)
 	if receiver == "0000000000000000000000000000000000000000" {
-		receiver = hex.EncodeToString(tx.CreationAddress())
+		receiver = ethutil.Bytes2Hex(tx.CreationAddress())
 	}
-	sender := hex.EncodeToString(tx.Sender())
+	sender := ethutil.Bytes2Hex(tx.Sender())
 	createsContract := tx.CreatesContract()
 
 	var data string
 	if tx.CreatesContract() {
 		data = strings.Join(ethchain.Disassemble(tx.Data), "\n")
 	} else {
-		data = hex.EncodeToString(tx.Data)
+		data = ethutil.Bytes2Hex(tx.Data)
 	}
 
-	return &PTx{ref: tx, Hash: hash, Value: ethutil.CurrencyToString(tx.Value), Address: receiver, Contract: tx.CreatesContract(), Gas: tx.Gas.String(), GasPrice: tx.GasPrice.String(), Data: data, Sender: sender, CreatesContract: createsContract, RawData: hex.EncodeToString(tx.Data)}
+	return &PTx{ref: tx, Hash: hash, Value: ethutil.CurrencyToString(tx.Value), Address: receiver, Contract: tx.CreatesContract(), Gas: tx.Gas.String(), GasPrice: tx.GasPrice.String(), Data: data, Sender: sender, CreatesContract: createsContract, RawData: ethutil.Bytes2Hex(tx.Data)}
 }
 
 func (self *PTx) ToString() string {
@@ -131,8 +131,8 @@ type PKey struct {
 	PublicKey  string `json:"publicKey"`
 }
 
-func NewPKey(key *ethutil.KeyPair) *PKey {
-	return &PKey{ethutil.Hex(key.Address()), ethutil.Hex(key.PrivateKey), ethutil.Hex(key.PublicKey)}
+func NewPKey(key *ethcrypto.KeyPair) *PKey {
+	return &PKey{ethutil.Bytes2Hex(key.Address()), ethutil.Bytes2Hex(key.PrivateKey), ethutil.Bytes2Hex(key.PublicKey)}
 }
 
 type PReceipt struct {
@@ -145,9 +145,9 @@ type PReceipt struct {
 func NewPReciept(contractCreation bool, creationAddress, hash, address []byte) *PReceipt {
 	return &PReceipt{
 		contractCreation,
-		ethutil.Hex(creationAddress),
-		ethutil.Hex(hash),
-		ethutil.Hex(address),
+		ethutil.Bytes2Hex(creationAddress),
+		ethutil.Bytes2Hex(hash),
+		ethutil.Bytes2Hex(address),
 	}
 }
 
@@ -182,7 +182,7 @@ func (c *PStateObject) Value() string {
 
 func (c *PStateObject) Address() string {
 	if c.object != nil {
-		return ethutil.Hex(c.object.Address())
+		return ethutil.Bytes2Hex(c.object.Address())
 	}
 
 	return ""
@@ -198,7 +198,7 @@ func (c *PStateObject) Nonce() int {
 
 func (c *PStateObject) Root() string {
 	if c.object != nil {
-		return ethutil.Hex(ethutil.NewValue(c.object.State().Root()).Bytes())
+		return ethutil.Bytes2Hex(ethutil.NewValue(c.object.State().Root()).Bytes())
 	}
 
 	return "<err>"
@@ -221,7 +221,7 @@ func (c *PStateObject) StateKeyVal(asJson bool) interface{} {
 	var values []KeyVal
 	if c.object != nil {
 		c.object.State().EachStorage(func(name string, value *ethutil.Value) {
-			values = append(values, KeyVal{name, ethutil.Hex(value.Bytes())})
+			values = append(values, KeyVal{name, ethutil.Bytes2Hex(value.Bytes())})
 		})
 	}
 
@@ -247,7 +247,7 @@ func (c *PStateObject) Script() string {
 
 func (c *PStateObject) HexScript() string {
 	if c.object != nil {
-		return ethutil.Hex(c.object.Script())
+		return ethutil.Bytes2Hex(c.object.Script())
 	}
 
 	return ""
@@ -260,5 +260,5 @@ type PStorageState struct {
 }
 
 func NewPStorageState(storageObject *ethchain.StorageState) *PStorageState {
-	return &PStorageState{ethutil.Hex(storageObject.StateAddress), ethutil.Hex(storageObject.Address), storageObject.Value.String()}
+	return &PStorageState{ethutil.Bytes2Hex(storageObject.StateAddress), ethutil.Bytes2Hex(storageObject.Address), storageObject.Value.String()}
 }
diff --git a/ethrpc/packages.go b/ethrpc/packages.go
index 710275780..0662f0edd 100644
--- a/ethrpc/packages.go
+++ b/ethrpc/packages.go
@@ -182,7 +182,7 @@ func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *string) error {
 	} else {
 		// Convert the incoming string (which is a bigint) into hex
 		i, _ := new(big.Int).SetString(args.Key, 10)
-		hx = ethutil.Hex(i.Bytes())
+		hx = ethutil.Bytes2Hex(i.Bytes())
 	}
 	logger.Debugf("GetStorageAt(%s, %s)\n", args.Address, hx)
 	value := state.GetStorage(hx)
diff --git a/peer.go b/peer.go
index e50fd43f9..ffabb8f49 100644
--- a/peer.go
+++ b/peer.go
@@ -146,7 +146,7 @@ type Peer struct {
 }
 
 func NewPeer(conn net.Conn, ethereum *Ethereum, inbound bool) *Peer {
-	pubkey := ethutil.GetKeyRing().Get(0).PublicKey[1:]
+	pubkey := ethereum.KeyManager().PublicKey()[1:]
 
 	return &Peer{
 		outputQueue:     make(chan *ethwire.Msg, outputBufferSize),
@@ -590,16 +590,12 @@ func (p *Peer) Stop() {
 }
 
 func (p *Peer) pushHandshake() error {
-	keyRing := ethutil.GetKeyRing().Get(0)
-	if keyRing != nil {
-		pubkey := keyRing.PublicKey
+	pubkey := p.ethereum.KeyManager().PublicKey()
+	msg := ethwire.NewMessage(ethwire.MsgHandshakeTy, []interface{}{
+		uint32(ProtocolVersion), uint32(0), []byte(p.version), byte(p.caps), p.port, pubkey[1:],
+	})
 
-		msg := ethwire.NewMessage(ethwire.MsgHandshakeTy, []interface{}{
-			uint32(ProtocolVersion), uint32(0), []byte(p.version), byte(p.caps), p.port, pubkey[1:],
-		})
-
-		p.QueueMessage(msg)
-	}
+	p.QueueMessage(msg)
 
 	return nil
 }
@@ -664,8 +660,8 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 		p.port = uint16(c.Get(4).Uint())
 
 		// Self connect detection
-		keyPair := ethutil.GetKeyRing().Get(0)
-		if bytes.Compare(keyPair.PublicKey, p.pubkey) == 0 {
+		pubkey := p.ethereum.KeyManager().PublicKey()
+		if bytes.Compare(pubkey, p.pubkey) == 0 {
 			p.Stop()
 
 			return