diff --git a/tuf/keys.py b/tuf/keys.py
index 5d4c3ab4..3582f665 100755
--- a/tuf/keys.py
+++ b/tuf/keys.py
@@ -1204,7 +1204,7 @@ def encrypt_key(key_object, password):
     performs the actual cryptographic operation on 'key_object'.  Whereas
     an encrypted PEM file uses the Triple Data Encryption Algorithm (3DES), the
     Cipher-block chaining (CBC) mode of operation, and the Password-Based Key
-    Derivation Function 1 (PBKF1) + MD5 to strengthen 'password', encrypted
+    Derivation Function 1 (PBKDF1) + MD5 to strengthen 'password', encrypted
     TUF keys use AES-256-CTR-Mode and passwords strengthened with
     PBKDF2-HMAC-SHA256 (100K iterations by default, but may be overriden in
     'tuf.conf.PBKDF2_ITERATIONS' by the user).
@@ -1298,7 +1298,7 @@ def decrypt_key(encrypted_key, passphrase):
     performs the actual cryptographic operation on 'key_object'.  Whereas
     an encrypted PEM file uses the Triple Data Encryption Algorithm (3DES), the
     Cipher-block chaining (CBC) mode of operation, and the Password-Based Key
-    Derivation Function 1 (PBKF1) + MD5 to strengthen 'password', encrypted
+    Derivation Function 1 (PBKDF1) + MD5 to strengthen 'password', encrypted
     TUF keys use AES-256-CTR-Mode and passwords strengthened with
     PBKDF2-HMAC-SHA256 (100K iterations be default, but may be overriden in
     'tuf.conf.py' by the user).
@@ -1397,7 +1397,7 @@ def create_rsa_encrypted_pem(private_key, passphrase):
   Return a string in PEM format, where the private part of the RSA key is
   encrypted. The private part of the RSA key is encrypted by the Triple
   Data Encryption Algorithm (3DES) and Cipher-block chaining (CBC) for the
-  mode of operation. Password-Based Key Derivation Function 1 (PBKF1) + MD5
+  mode of operation. Password-Based Key Derivation Function 1 (PBKDF1) + MD5
   is used to strengthen 'passphrase'.
 
   https://en.wikipedia.org/wiki/Triple_DES
diff --git a/tuf/pyca_crypto_keys.py b/tuf/pyca_crypto_keys.py
index 164ca3cf..89af89c7 100755
--- a/tuf/pyca_crypto_keys.py
+++ b/tuf/pyca_crypto_keys.py
@@ -47,7 +47,7 @@
   
   PEM-encrypted RSA key files use the Triple Data Encryption Algorithm (3DES),
   and Cipher-block chaining (CBC) for the mode of operation.  Password-Based Key
-  Derivation Function 1 (PBKF1) + MD5.
+  Derivation Function 1 (PBKDF1) + MD5.
  """
 
 # Help with Python 3 compatibility, where the print statement is a function, an
@@ -471,7 +471,7 @@ def create_rsa_encrypted_pem(private_key, passphrase):
     Return a string in PEM format, where the private part of the RSA key is
     encrypted.  The private part of the RSA key is encrypted by the Triple
     Data Encryption Algorithm (3DES) and Cipher-block chaining (CBC) for the 
-    mode of operation.  Password-Based Key Derivation Function 1 (PBKF1) + MD5
+    mode of operation.  Password-Based Key Derivation Function 1 (PBKDF1) + MD5
     is used to strengthen 'passphrase'.
 
     TODO: Generate encrypted PEM (that matches PyCrypto's) once support is
@@ -681,7 +681,7 @@ def encrypt_key(key_object, password):
     
     Whereas an encrypted PEM file uses the Triple Data Encryption Algorithm
     (3DES), the Cipher-block chaining (CBC) mode of operation, and the Password
-    Based Key Derivation Function 1 (PBKF1) + MD5 to strengthen 'password',
+    Based Key Derivation Function 1 (PBKDF1) + MD5 to strengthen 'password',
     encrypted TUF keys use AES-256-CTR-Mode and passwords strengthened with
     PBKDF2-HMAC-SHA256 (100K iterations by default, but may be overriden in
     'tuf.conf.PBKDF2_ITERATIONS' by the user).
diff --git a/tuf/pycrypto_keys.py b/tuf/pycrypto_keys.py
index 45081dc8..0fc56eb6 100755
--- a/tuf/pycrypto_keys.py
+++ b/tuf/pycrypto_keys.py
@@ -43,7 +43,7 @@
   
   PEM-encrypted RSA key files use the Triple Data Encryption Algorithm (3DES)
   and Cipher-block chaining (CBC) for the mode of operation.  Password-Based Key
-  Derivation Function 1 (PBKF1) + MD5.
+  Derivation Function 1 (PBKDF1) + MD5.
  """
 
 # Help with Python 3 compatibility, where the print statement is a function, an
@@ -415,7 +415,7 @@ def create_rsa_encrypted_pem(private_key, passphrase):
     Return a string in PEM format, where the private part of the RSA key is
     encrypted.  The private part of the RSA key is encrypted by the Triple
     Data Encryption Algorithm (3DES) and Cipher-block chaining (CBC) for the 
-    mode of operation.  Password-Based Key Derivation Function 1 (PBKF1) + MD5
+    mode of operation.  Password-Based Key Derivation Function 1 (PBKDF1) + MD5
     is used to strengthen 'passphrase'.
 
     https://en.wikipedia.org/wiki/Triple_DES
@@ -611,7 +611,7 @@ def encrypt_key(key_object, password):
     
     Whereas an encrypted PEM file uses the Triple Data Encryption Algorithm
     (3DES), the Cipher-block chaining (CBC) mode of operation, and the Password
-    Based Key Derivation Function 1 (PBKF1) + MD5 to strengthen 'password',
+    Based Key Derivation Function 1 (PBKDF1) + MD5 to strengthen 'password',
     encrypted TUF keys use AES-256-CTR-Mode and passwords strengthened with
     PBKDF2-HMAC-SHA256 (100K iterations by default, but may be overriden in
     'tuf.conf.PBKDF2_ITERATIONS' by the user).