diff --git a/accounts/accounts.go b/accounts/accounts.go
index 78b63d3983..a599241bc3 100644
--- a/accounts/accounts.go
+++ b/accounts/accounts.go
@@ -35,6 +35,13 @@ type Account struct {
 	URL     URL            `json:"url"`     // Optional resource locator within a backend
 }
 
+const (
+	MimetypeTextWithValidator = "text/validator"
+	MimetypeTypedData         = "data/typed"
+	MimetypeClique            = "application/x-clique-header"
+	MimetypeTextPlain         = "text/plain"
+)
+
 // Wallet represents a software or hardware wallet that might contain one or more
 // accounts (derived from the same seed).
 type Wallet interface {
@@ -114,6 +121,12 @@ type Wallet interface {
 	// the account in a keystore).
 	SignData(account Account, mimeType string, data []byte) ([]byte, error)
 
+	// SignDataWithPassphrase is identical to SignData, but also takes a password
+	// NOTE: there's an chance that an erroneous call might mistake the two strings, and
+	// supply password in the mimetype field, or vice versa. Thus, an implementation
+	// should never echo the mimetype or return the mimetype in the error-response
+	SignDataWithPassphrase(account Account, passphrase, mimeType string, data []byte) ([]byte, error)
+
 	// SignText requests the wallet to sign the given hash.
 	//
 	// It looks up the account specified either solely via its address contained within,
@@ -127,6 +140,9 @@ type Wallet interface {
 	// the account in a keystore).
 	SignText(account Account, text []byte) ([]byte, error)
 
+	// SignTextWithPassphrase is identical to Signtext, but also takes a password
+	SignTextWithPassphrase(account Account, passphrase string, hash []byte) ([]byte, error)
+
 	// SignTx requests the wallet to sign the given transaction.
 	//
 	// It looks up the account specified either solely via its address contained within,
@@ -140,18 +156,7 @@ type Wallet interface {
 	// the account in a keystore).
 	SignTx(account Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)
 
-	// SignTextWithPassphrase requests the wallet to sign the given hash with the
-	// given passphrase as extra authentication information.
-	//
-	// It looks up the account specified either solely via its address contained within,
-	// or optionally with the aid of any location metadata from the embedded URL field.
-	SignTextWithPassphrase(account Account, passphrase string, hash []byte) ([]byte, error)
-
-	// SignTxWithPassphrase requests the wallet to sign the given transaction, with the
-	// given passphrase as extra authentication information.
-	//
-	// It looks up the account specified either solely via its address contained within,
-	// or optionally with the aid of any location metadata from the embedded URL field.
+	// SignTxWithPassphrase is identical to SignTx, but also takes a password
 	SignTxWithPassphrase(account Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)
 }
 
diff --git a/accounts/keystore/wallet.go b/accounts/keystore/wallet.go
index 602d640caa..6b44a66f4e 100644
--- a/accounts/keystore/wallet.go
+++ b/accounts/keystore/wallet.go
@@ -97,10 +97,31 @@ func (w *keystoreWallet) SignData(account accounts.Account, mimeType string, dat
 	return w.SignHash(account, crypto.Keccak256(data))
 }
 
+// SignDataWithPassphrase signs keccak256(data). The mimetype parameter describes the type of data being signed
+func (w *keystoreWallet) SignDataWithPassphrase(account accounts.Account, passphrase, mimeType string, data []byte) ([]byte, error) {
+	// Make sure the requested account is contained within
+	if !w.Contains(account) {
+		return nil, accounts.ErrUnknownAccount
+	}
+	// Account seems valid, request the keystore to sign
+	return w.keystore.SignHashWithPassphrase(account, passphrase, crypto.Keccak256(data))
+}
+
 func (w *keystoreWallet) SignText(account accounts.Account, text []byte) ([]byte, error) {
 	return w.SignHash(account, accounts.TextHash(text))
 }
 
+// SignTextWithPassphrase implements accounts.Wallet, attempting to sign the
+// given hash with the given account using passphrase as extra authentication.
+func (w *keystoreWallet) SignTextWithPassphrase(account accounts.Account, passphrase string, text []byte) ([]byte, error) {
+	// Make sure the requested account is contained within
+	if !w.Contains(account) {
+		return nil, accounts.ErrUnknownAccount
+	}
+	// Account seems valid, request the keystore to sign
+	return w.keystore.SignHashWithPassphrase(account, passphrase, accounts.TextHash(text))
+}
+
 // SignTx implements accounts.Wallet, attempting to sign the given transaction
 // with the given account. If the wallet does not wrap this particular account,
 // an error is returned to avoid account leakage (even though in theory we may
@@ -114,17 +135,6 @@ func (w *keystoreWallet) SignTx(account accounts.Account, tx *types.Transaction,
 	return w.keystore.SignTx(account, tx, chainID)
 }
 
-// SignTextWithPassphrase implements accounts.Wallet, attempting to sign the
-// given hash with the given account using passphrase as extra authentication.
-func (w *keystoreWallet) SignTextWithPassphrase(account accounts.Account, passphrase string, text []byte) ([]byte, error) {
-	// Make sure the requested account is contained within
-	if !w.Contains(account) {
-		return nil, accounts.ErrUnknownAccount
-	}
-	// Account seems valid, request the keystore to sign
-	return w.keystore.SignHashWithPassphrase(account, passphrase, accounts.TextHash(text))
-}
-
 // SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
 // transaction with the given account using passphrase as extra authentication.
 func (w *keystoreWallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
diff --git a/accounts/usbwallet/wallet.go b/accounts/usbwallet/wallet.go
index 40dda2b410..1cbf7a75d7 100644
--- a/accounts/usbwallet/wallet.go
+++ b/accounts/usbwallet/wallet.go
@@ -507,6 +507,13 @@ func (w *wallet) SignData(account accounts.Account, mimeType string, data []byte
 	return w.SignHash(account, crypto.Keccak256(data))
 }
 
+// SignDataWithPassphrase implements accounts.Wallet, attempting to sign the given
+// data with the given account using passphrase as extra authentication.
+// Since USB wallets don't rely on passphrases, these are silently ignored.
+func (w *wallet) SignDataWithPassphrase(account accounts.Account, passphrase, mimeType string, data []byte) ([]byte, error) {
+	return w.SignData(account, mimeType, data)
+}
+
 func (w *wallet) SignText(account accounts.Account, text []byte) ([]byte, error) {
 	return w.SignHash(account, accounts.TextHash(text))
 }