diff --git a/README.md b/README.md
index c0b1abc..638373c 100644
--- a/README.md
+++ b/README.md
@@ -9,14 +9,17 @@ Currently the following commands are implemented:
  * Reset
  * GenerateAsymmetricKey
  * SignDataEddsa
- * SignDataPkcs1
  * PutAsymmetricKey
  * GetPubKey
  * DeriveEcdh
  * Echo
  * ChangeAuthenticationKey
+ * PutAuthenticationKey
+ * GetOpaque
+ * PutOpaque
+ * SignDataPkcs1
+ * SignAttestationCertificate
  * Authentication & Session related commands
- * GetPseudoRandom
 
 Implementing new commands is really easy. Please consult `commands/constructors.go` and `commands/response.go` for reference.
 
diff --git a/commands/constructors.go b/commands/constructors.go
index c200854..d269f9d 100644
--- a/commands/constructors.go
+++ b/commands/constructors.go
@@ -94,20 +94,6 @@ func CreateSignDataEcdsaCommand(keyID uint16, data []byte) (*CommandMessage, err
 	return command, nil
 }
 
-func CreateSignDataPkcs1Command(keyID uint16, data []byte) (*CommandMessage, error) {
-	command := &CommandMessage{
-		CommandType: CommandTypeSignDataPkcs1,
-	}
-
-	payload := bytes.NewBuffer([]byte{})
-	binary.Write(payload, binary.BigEndian, keyID)
-	payload.Write(data)
-
-	command.Data = payload.Bytes()
-
-	return command, nil
-}
-
 func CreatePutAsymmetricKeyCommand(keyID uint16, label []byte, domains uint16, capabilities uint64, algorithm Algorithm, keyPart1 []byte, keyPart2 []byte) (*CommandMessage, error) {
 	if len(label) > LabelLength {
 		return nil, errors.New("label is too long")
@@ -151,6 +137,26 @@ func NewIDOption(id uint16) ListCommandOption {
 	}
 }
 
+func NewDomainOption(domain uint16) ListCommandOption {
+	return func(w io.Writer) {
+		binary.Write(w, binary.BigEndian, ListObjectParamDomains)
+		binary.Write(w, binary.BigEndian, domain)
+	}
+}
+
+func NewLabelOption(label []byte) (ListCommandOption, error) {
+	if len(label) > LabelLength {
+		return nil, errors.New("label is too long")
+	}
+	if len(label) < LabelLength {
+		label = append(label, bytes.Repeat([]byte{0x00}, LabelLength-len(label))...)
+	}
+	return func(w io.Writer) {
+		binary.Write(w, binary.BigEndian, ListObjectParamLabel)
+		binary.Write(w, binary.BigEndian, label)
+	}, nil
+}
+
 func CreateListObjectsCommand(options ...ListCommandOption) (*CommandMessage, error) {
 	command := &CommandMessage{
 		CommandType: CommandTypeListObjects,
@@ -235,6 +241,33 @@ func CreateDeriveEcdhCommand(objID uint16, pubkey []byte) (*CommandMessage, erro
 	return command, nil
 }
 
+func CreatePutAuthenticationKeyCommand(objID uint16, label []byte, domains uint16, capabilities uint64, delegated uint64, password string) (*CommandMessage, error) {
+	if len(label) > LabelLength {
+		return nil, errors.New("label is too long")
+	}
+	if len(label) < LabelLength {
+		label = append(label, bytes.Repeat([]byte{0x00}, LabelLength-len(label))...)
+	}
+
+	command := &CommandMessage{
+		CommandType: CommandTypePutAuthKey,
+	}
+
+	authKey := authkey.NewFromPassword(password)
+	payload := bytes.NewBuffer([]byte{})
+	binary.Write(payload, binary.BigEndian, objID)
+	payload.Write(label)
+	binary.Write(payload, binary.BigEndian, domains)
+	binary.Write(payload, binary.BigEndian, capabilities)
+	binary.Write(payload, binary.BigEndian, AlgorithmYubicoAESAuthentication)
+	binary.Write(payload, binary.BigEndian, delegated)
+	payload.Write(authKey.GetEncKey())
+	payload.Write(authKey.GetMacKey())
+	command.Data = payload.Bytes()
+
+	return command, nil
+}
+
 func CreateChangeAuthenticationKeyCommand(objID uint16, newPassword string) (*CommandMessage, error) {
 	command := &CommandMessage{
 		CommandType: CommandTypeChangeAuthenticationKey,
@@ -251,90 +284,65 @@ func CreateChangeAuthenticationKeyCommand(objID uint16, newPassword string) (*Co
 	return command, nil
 }
 
-func CreateGetPseudoRandomCommand(numBytes uint16) *CommandMessage {
-	command := &CommandMessage{
-		CommandType: CommandTypeGetPseudoRandom,
-	}
-
-	payload := bytes.NewBuffer([]byte{})
-	binary.Write(payload, binary.BigEndian, numBytes)
-	command.Data = payload.Bytes()
-
-	return command
-}
-
-func CreatePutWrapkeyCommand(objID uint16, label []byte, domains uint16, capabilities uint64, algorithm Algorithm, delegated uint64, wrapkey []byte) (*CommandMessage, error) {
+func CreatePutOpaqueCommand(objID uint16, label []byte, domains uint16, capabilities uint64, algorithm Algorithm, data []byte) (*CommandMessage, error) {
 	if len(label) > LabelLength {
 		return nil, errors.New("label is too long")
 	}
 	if len(label) < LabelLength {
 		label = append(label, bytes.Repeat([]byte{0x00}, LabelLength-len(label))...)
 	}
-	switch algorithm {
-	case AlgorithmAES128CCMWrap:
-		if keyLen := len(wrapkey); keyLen != 16 {
-			return nil, errors.New("wrapkey is wrong length")
-		}
-	case AlgorithmAES192CCMWrap:
-		if keyLen := len(wrapkey); keyLen != 24 {
-			return nil, errors.New("wrapkey is wrong length")
-		}
-	case AlgorithmAES256CCMWrap:
-		if keyLen := len(wrapkey); keyLen != 32 {
-			return nil, errors.New("wrapkey is wrong length")
-		}
-	default:
-		return nil, errors.New("invalid algorithm")
-	}
 
 	command := &CommandMessage{
-		CommandType: CommandTypePutWrapKey,
+		CommandType: CommandTypePutOpaque,
 	}
 
-	payload := bytes.NewBuffer([]byte{})
+	payload := bytes.NewBuffer(nil)
 	binary.Write(payload, binary.BigEndian, objID)
 	payload.Write(label)
 	binary.Write(payload, binary.BigEndian, domains)
 	binary.Write(payload, binary.BigEndian, capabilities)
 	binary.Write(payload, binary.BigEndian, algorithm)
-	binary.Write(payload, binary.BigEndian, delegated)
-	payload.Write(wrapkey)
+	payload.Write(data)
 
 	command.Data = payload.Bytes()
 
 	return command, nil
 }
 
-func CreatePutAuthkeyCommand(objID uint16, label []byte, domains uint16, capabilities, delegated uint64, encKey, macKey []byte) (*CommandMessage, error) {
-	if len(label) > LabelLength {
-		return nil, errors.New("label is too long")
-	}
-	if len(label) < LabelLength {
-		label = append(label, bytes.Repeat([]byte{0x00}, LabelLength-len(label))...)
-	}
-	algorithm := AlgorithmYubicoAESAuthentication
-	// TODO: support P256 Authentication when it is released
-	// https://github.com/Yubico/yubihsm-shell/blob/1c8e254603e72f3f39cf1c3910996dbfcdba2b12/lib/yubihsm.c#L3110
-	if len(encKey) != 16 {
-		return nil, errors.New("invalid encryption key length")
-	}
-	if len(macKey) != 16 {
-		return nil, errors.New("invalid mac key length")
+func CreateGetOpaqueCommand(objID uint16) (*CommandMessage, error) {
+	command := &CommandMessage{
+		CommandType: CommandTypeGetOpaque,
 	}
 
+	payload := bytes.NewBuffer(nil)
+	binary.Write(payload, binary.BigEndian, objID)
+	command.Data = payload.Bytes()
+
+	return command, nil
+}
+
+func CreateSignDataPkcs1Command(objID uint16, data []byte) (*CommandMessage, error) {
 	command := &CommandMessage{
-		CommandType: CommandTypePutAuthKey,
+		CommandType: CommandTypeSignDataPkcs1,
 	}
 
 	payload := bytes.NewBuffer([]byte{})
 	binary.Write(payload, binary.BigEndian, objID)
-	payload.Write(label)
-	binary.Write(payload, binary.BigEndian, domains)
-	binary.Write(payload, binary.BigEndian, capabilities)
-	binary.Write(payload, binary.BigEndian, algorithm)
-	binary.Write(payload, binary.BigEndian, delegated)
-	payload.Write(encKey)
-	payload.Write(macKey)
+	payload.Write(data)
+
+	command.Data = payload.Bytes()
+
+	return command, nil
+}
+
+func CreateSignAttestationCertCommand(keyObjID, attestationObjID uint16) (*CommandMessage, error) {
+	command := &CommandMessage{
+		CommandType: CommandTypeAttestAsymmetric,
+	}
+
+	payload := bytes.NewBuffer([]byte{})
+	binary.Write(payload, binary.BigEndian, keyObjID)
+	binary.Write(payload, binary.BigEndian, attestationObjID)
 
 	command.Data = payload.Bytes()
 
diff --git a/commands/response.go b/commands/response.go
index e9aa55d..c8d5b73 100644
--- a/commands/response.go
+++ b/commands/response.go
@@ -62,10 +62,6 @@ type (
 		Signature []byte
 	}
 
-	SignDataPkcs1Response struct {
-		Signature []byte
-	}
-
 	SignDataEcdsaResponse struct {
 		Signature []byte
 	}
@@ -84,16 +80,28 @@ type (
 		XCoordinate []byte
 	}
 
+	PutAuthenticationKeyResponse struct {
+		ObjectID uint16
+	}
+
 	ChangeAuthenticationKeyResponse struct {
 		ObjectID uint16
 	}
 
-	PutWrapkeyResponse struct {
+	PutOpaqueResponse struct {
 		ObjectID uint16
 	}
 
-	PutAuthkeyResponse struct {
-		ObjectID uint16
+	GetOpaqueResponse struct {
+		Data []byte
+	}
+
+	SignDataPkcs1Response struct {
+		Signature []byte
+	}
+
+	SignAttestationCertResponse struct {
+		Cert []byte
 	}
 )
 
@@ -131,8 +139,6 @@ func ParseResponse(data []byte) (Response, error) {
 		return parseSignDataEddsaResponse(payload)
 	case CommandTypeSignDataEcdsa:
 		return parseSignDataEcdsaResponse(payload)
-	case CommandTypeSignDataPkcs1:
-		return parseSignDataPkcs1Response(payload)
 	case CommandTypePutAsymmetric:
 		return parsePutAsymmetricKeyResponse(payload)
 	case CommandTypeListObjects:
@@ -149,14 +155,18 @@ func ParseResponse(data []byte) (Response, error) {
 		return parseEchoResponse(payload)
 	case CommandTypeDeriveEcdh:
 		return parseDeriveEcdhResponse(payload)
+	case CommandTypePutAuthKey:
+		return parsePutAuthenticationKeyResponse(payload)
 	case CommandTypeChangeAuthenticationKey:
 		return parseChangeAuthenticationKeyResponse(payload)
-	case CommandTypeGetPseudoRandom:
-		return parseGetPseudoRandomResponse(payload), nil
-	case CommandTypePutWrapKey:
-		return parsePutWrapkeyResponse(payload)
-	case CommandTypePutAuthKey:
-		return parsePutAuthkeyResponse(payload)
+	case CommandTypePutOpaque:
+		return parsePutOpaqueResponse(payload)
+	case CommandTypeGetOpaque:
+		return parseGetOpaqueResponse(payload)
+	case CommandTypeSignDataPkcs1:
+		return parseSignDataPkcs1Response(payload)
+	case CommandTypeAttestAsymmetric:
+		return parseAttestationCertResponse(payload)
 	case ErrorResponseCode:
 		return nil, parseErrorResponse(payload)
 	default:
@@ -216,12 +226,6 @@ func parseSignDataEddsaResponse(payload []byte) (Response, error) {
 	}, nil
 }
 
-func parseSignDataPkcs1Response(payload []byte) (Response, error) {
-	return &SignDataPkcs1Response{
-		Signature: payload,
-	}, nil
-}
-
 func parseSignDataEcdsaResponse(payload []byte) (Response, error) {
 	return &SignDataEcdsaResponse{
 		Signature: payload,
@@ -294,6 +298,20 @@ func parseDeriveEcdhResponse(payload []byte) (Response, error) {
 	}, nil
 }
 
+func parsePutAuthenticationKeyResponse(payload []byte) (Response, error) {
+	if len(payload) != 2 {
+		return nil, errors.New("invalid response payload length")
+	}
+
+	var objectID uint16
+	err := binary.Read(bytes.NewReader(payload), binary.BigEndian, &objectID)
+	if err != nil {
+		return nil, err
+	}
+
+	return &PutAuthenticationKeyResponse{ObjectID: objectID}, nil
+}
+
 func parseChangeAuthenticationKeyResponse(payload []byte) (Response, error) {
 	if len(payload) != 2 {
 		return nil, errors.New("invalid response payload length")
@@ -308,11 +326,7 @@ func parseChangeAuthenticationKeyResponse(payload []byte) (Response, error) {
 	return &ChangeAuthenticationKeyResponse{ObjectID: objectID}, nil
 }
 
-func parseGetPseudoRandomResponse(payload []byte) Response {
-	return payload
-}
-
-func parsePutWrapkeyResponse(payload []byte) (Response, error) {
+func parsePutOpaqueResponse(payload []byte) (Response, error) {
 	if len(payload) != 2 {
 		return nil, errors.New("invalid response payload length")
 	}
@@ -322,20 +336,40 @@ func parsePutWrapkeyResponse(payload []byte) (Response, error) {
 	if err != nil {
 		return nil, err
 	}
-	return &PutWrapkeyResponse{ObjectID: objectID}, nil
+
+	return &PutOpaqueResponse{
+		ObjectID: objectID,
+	}, nil
 }
 
-func parsePutAuthkeyResponse(payload []byte) (Response, error) {
-	if len(payload) != 2 {
+func parseGetOpaqueResponse(payload []byte) (Response, error) {
+	if len(payload) < 1 {
 		return nil, errors.New("invalid response payload length")
 	}
 
-	var objectID uint16
-	err := binary.Read(bytes.NewReader(payload), binary.BigEndian, &objectID)
-	if err != nil {
-		return nil, err
+	return &GetOpaqueResponse{
+		Data: payload,
+	}, nil
+}
+
+func parseSignDataPkcs1Response(payload []byte) (Response, error) {
+	if len(payload) < 1 {
+		return nil, errors.New("invalid response payload length")
 	}
-	return &PutAuthkeyResponse{ObjectID: objectID}, nil
+
+	return &SignDataPkcs1Response{
+		Signature: payload,
+	}, nil
+}
+
+func parseAttestationCertResponse(payload []byte) (Response, error) {
+	if len(payload) < 1 {
+		return nil, errors.New("invalid response payload length")
+	}
+
+	return &SignAttestationCertResponse{
+		Cert: payload,
+	}, nil
 }
 
 // Error formats a card error message into a human readable format
@@ -366,12 +400,18 @@ func (e *Error) Error() string {
 		message = "Log full"
 	case ErrorCodeObjectNotFound:
 		message = "Object not found"
-	case ErrorCodeIDIllegal:
-		message = "ID illegal"
-	case ErrorCodeCommandUnexecuted:
-		message = "Command unexecuted"
+	case ErrorCodeInvalidID:
+		message = "Invalid ID"
+	case ErrorCodeSSHCAConstraintViolation:
+		message = "SSH CA constraint violation"
+	case ErrorCodeInvalidOTP:
+		message = "Invalid OTP"
+	case ErrorCodeDemoMode:
+		message = "Demo mode"
+	case ErrorCodeObjectExists:
+		message = "Object exists"
 	default:
-		message = "unknown"
+		message = "Unknown"
 	}
 
 	return fmt.Sprintf("card responded with error: %s", message)
diff --git a/commands/types.go b/commands/types.go
index 7812a70..f65aac3 100644
--- a/commands/types.go
+++ b/commands/types.go
@@ -64,31 +64,35 @@ const (
 	CommandTypeChangeAuthenticationKey CommandType = 0x6c
 
 	// Errors
-	ErrorCodeOK                ErrorCode = 0x00
-	ErrorCodeInvalidCommand    ErrorCode = 0x01
-	ErrorCodeInvalidData       ErrorCode = 0x02
-	ErrorCodeInvalidSession    ErrorCode = 0x03
-	ErrorCodeAuthFail          ErrorCode = 0x04
-	ErrorCodeSessionFull       ErrorCode = 0x05
-	ErrorCodeSessionFailed     ErrorCode = 0x06
-	ErrorCodeStorageFailed     ErrorCode = 0x07
-	ErrorCodeWrongLength       ErrorCode = 0x08
-	ErrorCodeInvalidPermission ErrorCode = 0x09
-	ErrorCodeLogFull           ErrorCode = 0x0a
-	ErrorCodeObjectNotFound    ErrorCode = 0x0b
-	ErrorCodeIDIllegal         ErrorCode = 0x0c
-	ErrorCodeCommandUnexecuted ErrorCode = 0xff
+	ErrorCodeOK                         ErrorCode = 0x00
+	ErrorCodeInvalidCommand             ErrorCode = 0x01
+	ErrorCodeInvalidData                ErrorCode = 0x02
+	ErrorCodeInvalidSession             ErrorCode = 0x03
+	ErrorCodeAuthFail                   ErrorCode = 0x04
+	ErrorCodeSessionFull                ErrorCode = 0x05
+	ErrorCodeSessionFailed              ErrorCode = 0x06
+	ErrorCodeStorageFailed              ErrorCode = 0x07
+	ErrorCodeWrongLength                ErrorCode = 0x08
+	ErrorCodeInvalidPermission          ErrorCode = 0x09
+	ErrorCodeLogFull                    ErrorCode = 0x0a
+	ErrorCodeObjectNotFound             ErrorCode = 0x0b
+	ErrorCodeInvalidID                  ErrorCode = 0x0c
+	ErrorCodeSSHCAConstraintViolation   ErrorCode = 0x0e
+	ErrorCodeInvalidOTP                 ErrorCode = 0x0f
+	ErrorCodeDemoMode                   ErrorCode = 0x10
+	ErrorCodeObjectExists               ErrorCode = 0x11
 
 	// Algorithms
+	AlgorithmRSA2048                 Algorithm = 9
 	AlgorithmP256                    Algorithm = 12
 	AlgorithmSecp256k1               Algorithm = 15
+	AlgorithmOpaqueData              Algorithm = 30
+	AlgorithmOpaqueX509Certificate   Algorithm = 31
 	AlgorithmYubicoAESAuthentication Algorithm = 38
-	AlgorighmED25519                 Algorithm = 46
-	AlgorithmAES128CCMWrap           Algorithm = 29
-	AlgorithmAES192CCMWrap           Algorithm = 41
-	AlgorithmAES256CCMWrap           Algorithm = 42
+	AlgorithmED25519                 Algorithm = 46
 
 	// Capabilities
+	CapabilityNone                  uint64 = 0x0000000000000000
 	CapabilityGetOpaque             uint64 = 0x0000000000000001
 	CapabilityPutOpaque             uint64 = 0x0000000000000002
 	CapabilityPutAuthKey            uint64 = 0x0000000000000004
@@ -106,7 +110,7 @@ const (
 	CapabilityImportWrapped         uint64 = 0x0000000000002000
 	CapabilityPutWrapKey            uint64 = 0x0000000000004000
 	CapabilityGenerateWrapKey       uint64 = 0x0000000000008000
-	CapabilityExportUnderWrap       uint64 = 0x0000000000010000
+	CapabilityExportableUnderWrap   uint64 = 0x0000000000010000
 	CapabilityPutOption             uint64 = 0x0000000000020000
 	CapabilityGetOption             uint64 = 0x0000000000040000
 	CapabilityGetRandomness         uint64 = 0x0000000000080000
@@ -136,6 +140,7 @@ const (
 	CapabilityDeleteHmacKey         uint64 = 0x0000080000000000
 	CapabilityDeleteTemplate        uint64 = 0x0000100000000000
 	CapabilityDeleteOtpAeadKey      uint64 = 0x0000200000000000
+	CapabilityChangeAuthKey         uint64 = 0x0000400000000000
 
 	// Domains
 	Domain1  uint16 = 0x0001
@@ -165,15 +170,10 @@ const (
 	ObjectTypeOtpAeadKey        uint8 = 0x07
 
 	// list objects params
-	ListObjectParamID   uint8 = 0x01
-	ListObjectParamType uint8 = 0x02
+	ListObjectParamID   		uint8 = 0x01
+	ListObjectParamType 		uint8 = 0x02
+	ListObjectParamDomains   	uint8 = 0x03
+	ListObjectParamCapabilities	uint8 = 0x04
+	ListObjectParamAlgorithm   	uint8 = 0x05
+	ListObjectParamLabel 		uint8 = 0x06
 )
-
-// CapabilityPrimitiveFromSlice OR's all the capabilitites together.
-func CapabilityPrimitiveFromSlice(capabilitites []uint64) uint64 {
-	var primitive uint64
-	for _, c := range capabilitites {
-		primitive |= c
-	}
-	return primitive
-}
diff --git a/go.mod b/go.mod
index ffc49e9..5485272 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,8 @@
 module github.com/certusone/yubihsm-go
 
+go 1.14
+
 require (
 	github.com/enceve/crypto v0.0.0-20160707101852-34d48bb93815
-	golang.org/x/crypto v0.0.0-20180830192347-182538f80094
+	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
 )
diff --git a/go.sum b/go.sum
index d019521..7b4a9de 100644
--- a/go.sum
+++ b/go.sum
@@ -2,3 +2,10 @@ github.com/enceve/crypto v0.0.0-20160707101852-34d48bb93815 h1:D22EM5TeYZJp43hGD
 github.com/enceve/crypto v0.0.0-20160707101852-34d48bb93815/go.mod h1:wYFFK4LYXbX7j+76mOq7aiC/EAw2S22CrzPHqgsisPw=
 golang.org/x/crypto v0.0.0-20180830192347-182538f80094 h1:rVTAlhYa4+lCfNxmAIEOGQRoD23UqP72M3+rSWVGDTg=
 golang.org/x/crypto v0.0.0-20180830192347-182538f80094/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2 h1:It14KIkyBFYkHkwZ7k45minvA9aorojkyjGk9KJ5B/w=
+golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
diff --git a/securechannel/channel.go b/securechannel/channel.go
index 9babf43..ff9d1bf 100644
--- a/securechannel/channel.go
+++ b/securechannel/channel.go
@@ -85,6 +85,8 @@ const (
 	MaxMessagesPerSession = 10000
 )
 
+var ErrAuthCryptogram = errors.New("authentication failed: device sent wrong cryptogram")
+
 // NewSecureChannel initiates a new secure channel to communicate with an HSM using the given authKey
 // Call Authenticate next to establish a session.
 func NewSecureChannel(connector connector.Connector, authKeySlot uint16, password string) (*SecureChannel, error) {
@@ -143,7 +145,7 @@ func (s *SecureChannel) Authenticate() error {
 	}
 
 	if !bytes.Equal(deviceCryptogram, createSessionResp.CardCryptogram) {
-		return errors.New("authentication failed: device sent wrong cryptogram")
+		return ErrAuthCryptogram
 	}
 
 	// Create host cryptogram