diff --git a/setup.py b/setup.py
index e19a0d2..f6c0ec4 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
   name        = 'PyOTA',
   description = 'IOTA API library for Python',
   url         = 'https://github.com/iotaledger/iota.lib.py',
-  version     = '1.1.2',
+  version     = '1.1.3',
 
   packages              = find_packages('src'),
   include_package_data  = True,
diff --git a/src/iota/crypto/addresses.py b/src/iota/crypto/addresses.py
index 44db482..25ba900 100644
--- a/src/iota/crypto/addresses.py
+++ b/src/iota/crypto/addresses.py
@@ -6,15 +6,16 @@
 from abc import ABCMeta, abstractmethod as abstract_method
 from contextlib import contextmanager as context_manager
 from threading import Lock
+
+from six import binary_type, with_metaclass
 from typing import Dict, Generator, Iterable, List, MutableSequence, \
-  Optional, Tuple
+  Optional
 
 from iota import Address, TRITS_PER_TRYTE, TrytesCompatible
 from iota.crypto import Curl
 from iota.crypto.signing import KeyGenerator, KeyIterator
-from iota.crypto.types import PrivateKey, Seed
+from iota.crypto.types import Digest, PrivateKey, Seed
 from iota.exceptions import with_context
-from six import binary_type, with_metaclass
 
 __all__ = [
   'AddressGenerator',
@@ -253,19 +254,19 @@ def create_iterator(self, start=0, step=1):
       yield address
 
   @staticmethod
-  def address_from_digest_trits(digest_trits, key_index):
-    # type: (List[int], int) -> Address
+  def address_from_digest(digest):
+    # type: (Digest) -> Address
     """
     Generates an address from a private key digest.
     """
     address_trits = [0] * (Address.LEN * TRITS_PER_TRYTE) # type: MutableSequence[int]
 
     sponge = Curl()
-    sponge.absorb(digest_trits)
+    sponge.absorb(digest.as_trits())
     sponge.squeeze(address_trits)
 
     address = Address.from_trits(address_trits)
-    address.key_index = key_index
+    address.key_index = digest.key_index
 
     return address
 
@@ -276,16 +277,16 @@ def _generate_address(self, key_iterator):
 
     Used in the event of a cache miss.
     """
-    return self.address_from_digest_trits(*self._get_digest_params(key_iterator))
+    return self.address_from_digest(self._get_digest(key_iterator))
 
   @staticmethod
-  def _get_digest_params(key_iterator):
-    # type: (KeyIterator) -> Tuple[List[int], int]
+  def _get_digest(key_iterator):
+    # type: (KeyIterator) -> Digest
     """
-    Extracts parameters for :py:meth:`address_from_digest_trits`.
+    Extracts parameters for :py:meth:`address_from_digest`.
 
     Split into a separate method so that it can be mocked during unit
     tests.
     """
     private_key = next(key_iterator) # type: PrivateKey
-    return private_key.get_digest_trits(), private_key.key_index
+    return private_key.get_digest()
diff --git a/src/iota/crypto/types.py b/src/iota/crypto/types.py
index 93a44d8..d7185df 100644
--- a/src/iota/crypto/types.py
+++ b/src/iota/crypto/types.py
@@ -4,20 +4,33 @@
 
 from math import ceil
 from os import urandom
-from typing import Callable, List, MutableSequence, Optional, Tuple
 
 from six import binary_type
+from typing import Callable, MutableSequence, Optional, Tuple
 
 from iota import Hash, TryteString, TrytesCompatible
 from iota.crypto import Curl, FRAGMENT_LENGTH, HASH_LENGTH
 from iota.exceptions import with_context
 
 __all__ = [
+  'Digest',
   'PrivateKey',
   'Seed',
 ]
 
 
+class Digest(TryteString):
+  """
+  A private key digest.  Basically the same thing as a regular
+  `TryteString`, except that it has a key index associated with it.
+  """
+  def __init__(self, trytes, key_index):
+    # type: (TrytesCompatible, int) -> None
+    super(Digest, self).__init__(trytes)
+
+    self.key_index = key_index
+
+
 class Seed(TryteString):
   """
   A TryteString that acts as a seed for crypto functions.
@@ -73,8 +86,8 @@ def __init__(self, trytes, key_index=None):
 
     self.key_index = key_index
 
-  def get_digest_trits(self):
-    # type: () -> List[int]
+  def get_digest(self):
+    # type: () -> Digest
     """
     Generates the digest used to do the actual signing.
 
@@ -119,4 +132,4 @@ def get_digest_trits(self):
 
       digest[fragment_start:fragment_end] = hash_trits
 
-    return digest
+    return Digest(TryteString.from_trits(digest), self.key_index)
diff --git a/test/crypto/addresses_test.py b/test/crypto/addresses_test.py
index 24d3679..8965f60 100644
--- a/test/crypto/addresses_test.py
+++ b/test/crypto/addresses_test.py
@@ -4,15 +4,14 @@
 
 from threading import Thread
 from time import sleep
-from typing import List, Tuple
 from unittest import TestCase
 
 from mock import Mock, patch
 
-from iota import Address, Hash
+from iota import Address
 from iota.crypto.addresses import AddressGenerator, MemoryAddressCache
 from iota.crypto.signing import KeyIterator
-from iota.crypto.types import Seed
+from iota.crypto.types import Digest, Seed
 
 
 class AddressGeneratorTestCase(TestCase):
@@ -21,7 +20,7 @@ def setUp(self):
     super(AddressGeneratorTestCase, self).setUp()
 
     # Addresses that correspond to the digests defined in
-    # :py:meth:`_mock_get_digest_params`.
+    # :py:meth:`_mock_get_digest`.
     self.addy0 =\
       Address(
         b'VOPYUSDRHYGGOHLAYDWCLLOFWBLK99PYYKENW9IQ'
@@ -52,13 +51,16 @@ def test_address_from_digest(self):
     Generating an address from a private key digest.
     """
     digest =\
-      Hash(
-        b'ABQXVJNER9MPMXMBPNMFBMDGTXRWSYHNZKGAGUOI'
-        b'JKOJGZVGHCUXXGFZEMMGDSGWDCKJXO9ILLFAKGGZE'
+      Digest(
+        trytes =
+          b'ABQXVJNER9MPMXMBPNMFBMDGTXRWSYHNZKGAGUOI'
+          b'JKOJGZVGHCUXXGFZEMMGDSGWDCKJXO9ILLFAKGGZE',
+
+        key_index = 0,
       )
 
     self.assertEqual(
-      AddressGenerator.address_from_digest_trits(digest.as_trits(), 0),
+      AddressGenerator.address_from_digest(digest),
 
       Address(
         b'QLOEDSBXXOLLUJYLEGKEPYDRIJJTPIMEPKMFHUVJ'
@@ -75,13 +77,13 @@ def test_get_addresses_single(self):
     ag = AddressGenerator(seed=b'')
 
     # noinspection PyUnresolvedReferences
-    with patch.object(ag, '_get_digest_params', self._mock_get_digest_params):
+    with patch.object(ag, '_get_digest', self._mock_get_digest):
       addresses = ag.get_addresses(start=0)
 
     self.assertListEqual(addresses, [self.addy0])
 
     # noinspection PyUnresolvedReferences
-    with patch.object(ag, '_get_digest_params', self._mock_get_digest_params):
+    with patch.object(ag, '_get_digest', self._mock_get_digest):
       # You can provide any positive integer as the ``start`` value.
       addresses = ag.get_addresses(start=2)
 
@@ -96,7 +98,7 @@ def test_get_addresses_multiple(self):
     ag = AddressGenerator(seed=b'')
 
     # noinspection PyUnresolvedReferences
-    with patch.object(ag, '_get_digest_params', self._mock_get_digest_params):
+    with patch.object(ag, '_get_digest', self._mock_get_digest):
       addresses = ag.get_addresses(start=1, count=2)
 
     self.assertListEqual(addresses, [self.addy1, self.addy2])
@@ -145,7 +147,7 @@ def test_get_addresses_step_negative(self):
     ag = AddressGenerator(seed=b'')
 
     # noinspection PyUnresolvedReferences
-    with patch.object(ag, '_get_digest_params', self._mock_get_digest_params):
+    with patch.object(ag, '_get_digest', self._mock_get_digest):
       addresses = ag.get_addresses(start=1, count=2, step=-1)
 
     self.assertListEqual(
@@ -165,7 +167,7 @@ def test_generator(self):
     ag = AddressGenerator(seed=b'')
 
     # noinspection PyUnresolvedReferences
-    with patch.object(ag, '_get_digest_params', self._mock_get_digest_params):
+    with patch.object(ag, '_get_digest', self._mock_get_digest):
       generator = ag.create_iterator()
 
       self.assertEqual(next(generator), self.addy0)
@@ -181,15 +183,15 @@ def test_generator_with_offset(self):
     ag = AddressGenerator(seed=b'')
 
     # noinspection PyUnresolvedReferences
-    with patch.object(ag, '_get_digest_params', self._mock_get_digest_params):
+    with patch.object(ag, '_get_digest', self._mock_get_digest):
       generator = ag.create_iterator(start=1, step=2)
 
       self.assertEqual(next(generator), self.addy1)
       self.assertEqual(next(generator), self.addy3)
 
   @staticmethod
-  def _mock_get_digest_params(key_iterator):
-    # type: (KeyIterator) -> Tuple[List[int], int]
+  def _mock_get_digest(key_iterator):
+    # type: (KeyIterator) -> Digest
     """
     Mocks the behavior of :py:class:`KeyGenerator`, to speed up unit
     tests.
@@ -220,7 +222,7 @@ def _mock_get_digest_params(key_iterator):
     # This should still behave like the real thing, so that we can
     # verify that :py:class`AddressGenerator` is invoking the key
     # generator correctly.
-    return Hash(digests[key_index]).as_trits(), key_index
+    return Digest(digests[key_index], key_index)
 
 
 class MemoryAddressCacheTestCase(TestCase):
diff --git a/test/crypto/types_test.py b/test/crypto/types_test.py
index b52ece0..ae851a9 100644
--- a/test/crypto/types_test.py
+++ b/test/crypto/types_test.py
@@ -10,9 +10,9 @@
 
 # noinspection SpellCheckingInspection
 class PrivateKeyTestCase(TestCase):
-  def test_get_digest_trits_single_fragment(self):
+  def test_get_digest_single_fragment(self):
     """
-    Generating digest trits from a PrivateKey 1 fragment long.
+    Generating digest from a PrivateKey 1 fragment long.
     """
     key =\
       PrivateKey(
@@ -53,7 +53,7 @@ def test_get_digest_trits_single_fragment(self):
       )
 
     self.assertEqual(
-      TryteString.from_trits(key.get_digest_trits()),
+      key.get_digest(),
 
       TryteString(
         b'ABQXVJNER9MPMXMBPNMFBMDGTXRWSYHNZKGAGUOI'
@@ -61,9 +61,9 @@ def test_get_digest_trits_single_fragment(self):
       ),
     )
 
-  def test_get_digest_trits_multiple_fragments(self):
+  def test_get_digest_multiple_fragments(self):
     """
-    Generating digest trits from a PrivateKey longer than 1 fragment.
+    Generating digest from a PrivateKey longer than 1 fragment.
     """
     key =\
       PrivateKey(
@@ -137,7 +137,7 @@ def test_get_digest_trits_multiple_fragments(self):
       )
 
     self.assertEqual(
-      TryteString.from_trits(key.get_digest_trits()),
+      key.get_digest(),
 
       # Note that the digest is 2 hashes long, because the key
       # is 2 fragments long.