diff --git a/src/Composer/Downloader/GitDownloader.php b/src/Composer/Downloader/GitDownloader.php
index b4deda07a..35f6aa754 100644
--- a/src/Composer/Downloader/GitDownloader.php
+++ b/src/Composer/Downloader/GitDownloader.php
@@ -52,11 +52,11 @@ class GitDownloader extends VcsDownloader
         $this->io->write("    Checking out ".$ref);
         $command = 'cd %s && git remote set-url composer %s && git fetch composer && git fetch --tags composer';
 
-        if (!$this->io->hasAuthorization('github.com')) {
+        if (!$this->io->hasAuthentication('github.com')) {
             // capture username/password from github URL if there is one
             $this->process->execute(sprintf('cd %s && git remote -v', escapeshellarg($path)), $output);
             if (preg_match('{^composer\s+https://(.+):(.+)@github.com/}im', $output, $match)) {
-                $this->io->setAuthorization('github.com', $match[1], $match[2]);
+                $this->io->setAuthentication('github.com', $match[1], $match[2]);
             }
         }
 
@@ -287,7 +287,7 @@ class GitDownloader extends VcsDownloader
         if (0 !== $this->process->execute($command, $handler)) {
             // private github repository without git access, try https with auth
             if (preg_match('{^git@(github.com):(.+?)\.git$}i', $url, $match)) {
-                if (!$this->io->hasAuthorization($match[1])) {
+                if (!$this->io->hasAuthentication($match[1])) {
                     $gitHubUtil = new GitHub($this->io, $this->config, $this->process);
                     $message = 'Cloning failed using an ssh key for authentication, enter your GitHub credentials to access private repos';
 
@@ -296,8 +296,8 @@ class GitDownloader extends VcsDownloader
                     }
                 }
 
-                if ($this->io->hasAuthorization($match[1])) {
-                    $auth = $this->io->getAuthorization($match[1]);
+                if ($this->io->hasAuthentication($match[1])) {
+                    $auth = $this->io->getAuthentication($match[1]);
                     $url = 'https://'.$auth['username'] . ':' . $auth['password'] . '@'.$match[1].'/'.$match[2].'.git';
 
                     $command = call_user_func($commandCallable, $url);
diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index 6495583c7..96d30aee8 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -152,7 +152,7 @@ class Factory
         // reload oauth token from config if available
         if ($tokens = $config->get('github-oauth')) {
             foreach ($tokens as $domain => $token) {
-                $io->setAuthorization($domain, $token, 'x-oauth-basic');
+                $io->setAuthentication($domain, $token, 'x-oauth-basic');
             }
         }
 
diff --git a/src/Composer/IO/ConsoleIO.php b/src/Composer/IO/ConsoleIO.php
index 4a31e15c6..c2dcc86ab 100644
--- a/src/Composer/IO/ConsoleIO.php
+++ b/src/Composer/IO/ConsoleIO.php
@@ -27,7 +27,7 @@ class ConsoleIO implements IOInterface
     protected $input;
     protected $output;
     protected $helperSet;
-    protected $authorizations = array();
+    protected $authentications = array();
     protected $lastMessage;
 
     /**
@@ -189,17 +189,17 @@ class ConsoleIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function getAuthorizations()
+    public function getAuthentications()
     {
-        return $this->authorizations;
+        return $this->authentications;
     }
 
     /**
      * {@inheritDoc}
      */
-    public function hasAuthorization($repositoryName)
+    public function hasAuthentication($repositoryName)
     {
-        $auths = $this->getAuthorizations();
+        $auths = $this->getAuthentications();
 
         return isset($auths[$repositoryName]);
     }
@@ -207,9 +207,9 @@ class ConsoleIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function getAuthorization($repositoryName)
+    public function getAuthentication($repositoryName)
     {
-        $auths = $this->getAuthorizations();
+        $auths = $this->getAuthentications();
 
         return isset($auths[$repositoryName]) ? $auths[$repositoryName] : array('username' => null, 'password' => null);
     }
@@ -217,8 +217,8 @@ class ConsoleIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function setAuthorization($repositoryName, $username, $password = null)
+    public function setAuthentication($repositoryName, $username, $password = null)
     {
-        $this->authorizations[$repositoryName] = array('username' => $username, 'password' => $password);
+        $this->authentications[$repositoryName] = array('username' => $username, 'password' => $password);
     }
 }
diff --git a/src/Composer/IO/IOInterface.php b/src/Composer/IO/IOInterface.php
index 539688530..1cb896c5f 100644
--- a/src/Composer/IO/IOInterface.php
+++ b/src/Composer/IO/IOInterface.php
@@ -109,20 +109,20 @@ interface IOInterface
     public function askAndHideAnswer($question);
 
     /**
-     * Get all authorization informations entered.
+     * Get all authentication information entered.
      *
-     * @return array The map of authorization
+     * @return array The map of authentication data
      */
-    public function getAuthorizations();
+    public function getAuthentications();
 
     /**
-     * Verify if the repository has a authorization informations.
+     * Verify if the repository has a authentication information.
      *
      * @param string $repositoryName The unique name of repository
      *
      * @return boolean
      */
-    public function hasAuthorization($repositoryName);
+    public function hasAuthentication($repositoryName);
 
     /**
      * Get the username and password of repository.
@@ -131,14 +131,14 @@ interface IOInterface
      *
      * @return array The 'username' and 'password'
      */
-    public function getAuthorization($repositoryName);
+    public function getAuthentication($repositoryName);
 
     /**
-     * Set the authorization informations for the repository.
+     * Set the authentication information for the repository.
      *
      * @param string $repositoryName The unique name of repository
      * @param string $username       The username
      * @param string $password       The password
      */
-    public function setAuthorization($repositoryName, $username, $password = null);
+    public function setAuthentication($repositoryName, $username, $password = null);
 }
diff --git a/src/Composer/IO/NullIO.php b/src/Composer/IO/NullIO.php
index b5ee190b3..670edd4b5 100644
--- a/src/Composer/IO/NullIO.php
+++ b/src/Composer/IO/NullIO.php
@@ -92,7 +92,7 @@ class NullIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function getAuthorizations()
+    public function getAuthentications()
     {
         return array();
     }
@@ -100,7 +100,7 @@ class NullIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function hasAuthorization($repositoryName)
+    public function hasAuthentication($repositoryName)
     {
         return false;
     }
@@ -108,7 +108,7 @@ class NullIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function getAuthorization($repositoryName)
+    public function getAuthentication($repositoryName)
     {
         return array('username' => null, 'password' => null);
     }
@@ -116,7 +116,7 @@ class NullIO implements IOInterface
     /**
      * {@inheritDoc}
      */
-    public function setAuthorization($repositoryName, $username, $password = null)
+    public function setAuthentication($repositoryName, $username, $password = null)
     {
     }
 }
diff --git a/src/Composer/Repository/Vcs/GitHubDriver.php b/src/Composer/Repository/Vcs/GitHubDriver.php
index da840673c..1546b7852 100755
--- a/src/Composer/Repository/Vcs/GitHubDriver.php
+++ b/src/Composer/Repository/Vcs/GitHubDriver.php
@@ -267,7 +267,7 @@ class GitHubDriver extends VcsDriver
                     return parent::getContents($url);
 
                 case 403:
-                    if (!$this->io->hasAuthorization($this->originUrl) && $gitHubUtil->authorizeOAuth($this->originUrl)) {
+                    if (!$this->io->hasAuthentication($this->originUrl) && $gitHubUtil->authorizeOAuth($this->originUrl)) {
                         return parent::getContents($url);
                     }
 
@@ -282,7 +282,7 @@ class GitHubDriver extends VcsDriver
                         }
                     }
 
-                    if (!$this->io->hasAuthorization($this->originUrl)) {
+                    if (!$this->io->hasAuthentication($this->originUrl)) {
                         if (!$this->io->isInteractive()) {
                             $this->io->write('<error>GitHub API limit exhausted. Failed to get metadata for the '.$this->url.' repository, try running in interactive mode so that you can enter your GitHub credentials to increase the API limit</error>');
                             throw $e;
diff --git a/src/Composer/Repository/Vcs/VcsDriver.php b/src/Composer/Repository/Vcs/VcsDriver.php
index 16af91946..777a11ea0 100644
--- a/src/Composer/Repository/Vcs/VcsDriver.php
+++ b/src/Composer/Repository/Vcs/VcsDriver.php
@@ -19,7 +19,7 @@ use Composer\Util\ProcessExecutor;
 use Composer\Util\RemoteFilesystem;
 
 /**
- * A driver implementation for driver with authorization interaction.
+ * A driver implementation for driver with authentication interaction.
  *
  * @author François Pluchino <francois.pluchino@opendisplay.com>
  */
diff --git a/src/Composer/Util/GitHub.php b/src/Composer/Util/GitHub.php
index e4010e4e7..573ecf516 100644
--- a/src/Composer/Util/GitHub.php
+++ b/src/Composer/Util/GitHub.php
@@ -57,7 +57,7 @@ class GitHub
 
         // if available use token from git config
         if (0 === $this->process->execute('git config github.accesstoken', $output)) {
-            $this->io->setAuthorization($originUrl, trim($output), 'x-oauth-basic');
+            $this->io->setAuthentication($originUrl, trim($output), 'x-oauth-basic');
 
             return true;
         }
@@ -85,7 +85,7 @@ class GitHub
             try {
                 $username = $this->io->ask('Username: ');
                 $password = $this->io->askAndHideAnswer('Password: ');
-                $this->io->setAuthorization($originUrl, $username, $password);
+                $this->io->setAuthentication($originUrl, $username, $password);
 
                 // build up OAuth app name
                 $appName = 'Composer';
@@ -114,7 +114,7 @@ class GitHub
                 throw $e;
             }
 
-            $this->io->setAuthorization($originUrl, $contents['token'], 'x-oauth-basic');
+            $this->io->setAuthentication($originUrl, $contents['token'], 'x-oauth-basic');
 
             // store value in user config
             $githubTokens = $this->config->get('github-oauth') ?: array();
diff --git a/src/Composer/Util/RemoteFilesystem.php b/src/Composer/Util/RemoteFilesystem.php
index 8f64b4407..aa1961c5a 100644
--- a/src/Composer/Util/RemoteFilesystem.php
+++ b/src/Composer/Util/RemoteFilesystem.php
@@ -221,7 +221,7 @@ class RemoteFilesystem
                     $this->io->overwrite('    Authentication required (<info>'.parse_url($this->fileUrl, PHP_URL_HOST).'</info>):');
                     $username = $this->io->ask('      Username: ');
                     $password = $this->io->askAndHideAnswer('      Password: ');
-                    $this->io->setAuthorization($this->originUrl, $username, $password);
+                    $this->io->setAuthentication($this->originUrl, $username, $password);
 
                     $this->get($this->originUrl, $this->fileUrl, $this->fileName, $this->progress);
                 }
@@ -277,8 +277,8 @@ class RemoteFilesystem
             $headers[] = 'Accept-Encoding: gzip';
         }
 
-        if ($this->io->hasAuthorization($originUrl)) {
-            $auth = $this->io->getAuthorization($originUrl);
+        if ($this->io->hasAuthentication($originUrl)) {
+            $auth = $this->io->getAuthentication($originUrl);
             $authStr = base64_encode($auth['username'] . ':' . $auth['password']);
             $headers[] = 'Authorization: Basic '.$authStr;
         }
diff --git a/tests/Composer/Test/IO/ConsoleIOTest.php b/tests/Composer/Test/IO/ConsoleIOTest.php
index f3ea6b15d..0d76758d4 100644
--- a/tests/Composer/Test/IO/ConsoleIOTest.php
+++ b/tests/Composer/Test/IO/ConsoleIOTest.php
@@ -149,22 +149,22 @@ class ConsoleIOTest extends TestCase
         $consoleIO->askAndValidate('Why?', 'validator', 10, 'default');
     }
 
-    public function testSetAndGetAuthorization()
+    public function testSetAndgetAuthentication()
     {
         $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
         $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
         $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
 
         $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
-        $consoleIO->setAuthorization('repoName', 'l3l0', 'passwd');
+        $consoleIO->setAuthentication('repoName', 'l3l0', 'passwd');
 
         $this->assertEquals(
             array('username' => 'l3l0', 'password' => 'passwd'),
-            $consoleIO->getAuthorization('repoName')
+            $consoleIO->getAuthentication('repoName')
         );
     }
 
-    public function testGetAuthorizationWhenDidNotSet()
+    public function testgetAuthenticationWhenDidNotSet()
     {
         $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
         $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
@@ -174,20 +174,20 @@ class ConsoleIOTest extends TestCase
 
         $this->assertEquals(
             array('username' => null, 'password' => null),
-            $consoleIO->getAuthorization('repoName')
+            $consoleIO->getAuthentication('repoName')
         );
     }
 
-    public function testHasAuthorization()
+    public function testhasAuthentication()
     {
         $inputMock = $this->getMock('Symfony\Component\Console\Input\InputInterface');
         $outputMock = $this->getMock('Symfony\Component\Console\Output\OutputInterface');
         $helperMock = $this->getMock('Symfony\Component\Console\Helper\HelperSet');
 
         $consoleIO = new ConsoleIO($inputMock, $outputMock, $helperMock);
-        $consoleIO->setAuthorization('repoName', 'l3l0', 'passwd');
+        $consoleIO->setAuthentication('repoName', 'l3l0', 'passwd');
 
-        $this->assertTrue($consoleIO->hasAuthorization('repoName'));
-        $this->assertFalse($consoleIO->hasAuthorization('repoName2'));
+        $this->assertTrue($consoleIO->hasAuthentication('repoName'));
+        $this->assertFalse($consoleIO->hasAuthentication('repoName2'));
     }
 }
diff --git a/tests/Composer/Test/IO/NullIOTest.php b/tests/Composer/Test/IO/NullIOTest.php
index 07577d5a1..cb2023d49 100644
--- a/tests/Composer/Test/IO/NullIOTest.php
+++ b/tests/Composer/Test/IO/NullIOTest.php
@@ -24,11 +24,11 @@ class NullIOTest extends TestCase
         $this->assertFalse($io->isInteractive());
     }
 
-    public function testHasAuthorization()
+    public function testhasAuthentication()
     {
         $io = new NullIO();
 
-        $this->assertFalse($io->hasAuthorization('foo'));
+        $this->assertFalse($io->hasAuthentication('foo'));
     }
 
     public function testAskAndHideAnswer()
@@ -38,13 +38,13 @@ class NullIOTest extends TestCase
         $this->assertNull($io->askAndHideAnswer('foo'));
     }
 
-    public function testGetAuthorizations()
+    public function testgetAuthentications()
     {
         $io = new NullIO();
 
-        $this->assertInternalType('array', $io->getAuthorizations());
-        $this->assertEmpty($io->getAuthorizations());
-        $this->assertEquals(array('username' => null, 'password' => null), $io->getAuthorization('foo'));
+        $this->assertInternalType('array', $io->getAuthentications());
+        $this->assertEmpty($io->getAuthentications());
+        $this->assertEquals(array('username' => null, 'password' => null), $io->getAuthentication('foo'));
     }
 
     public function testAsk()
diff --git a/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php b/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
index 1598a1826..3ea549556 100644
--- a/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
+++ b/tests/Composer/Test/Repository/Vcs/GitHubDriverTest.php
@@ -69,7 +69,7 @@ class GitHubDriverTest extends \PHPUnit_Framework_TestCase
             ->will($this->returnValue('somepassword'));
 
         $io->expects($this->any())
-            ->method('setAuthorization')
+            ->method('setAuthentication')
             ->with($this->equalTo('github.com'), $this->matchesRegularExpression('{someuser|abcdef}'), $this->matchesRegularExpression('{somepassword|x-oauth-basic}'));
 
         $remoteFilesystem->expects($this->at(1))
diff --git a/tests/Composer/Test/Util/RemoteFilesystemTest.php b/tests/Composer/Test/Util/RemoteFilesystemTest.php
index 90362c8f4..f9c1d398b 100644
--- a/tests/Composer/Test/Util/RemoteFilesystemTest.php
+++ b/tests/Composer/Test/Util/RemoteFilesystemTest.php
@@ -21,7 +21,7 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
         $io = $this->getMock('Composer\IO\IOInterface');
         $io
             ->expects($this->once())
-            ->method('hasAuthorization')
+            ->method('hasAuthentication')
             ->will($this->returnValue(false))
         ;
 
@@ -42,12 +42,12 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
         $io = $this->getMock('Composer\IO\IOInterface');
         $io
             ->expects($this->once())
-            ->method('hasAuthorization')
+            ->method('hasAuthentication')
             ->will($this->returnValue(true))
         ;
         $io
             ->expects($this->once())
-            ->method('getAuthorization')
+            ->method('getAuthentication')
             ->will($this->returnValue(array('username' => 'login', 'password' => 'password')))
         ;
 
@@ -67,7 +67,7 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
         $io = $this->getMock('Composer\IO\IOInterface');
         $io
             ->expects($this->once())
-            ->method('hasAuthorization')
+            ->method('hasAuthentication')
             ->will($this->returnValue(true))
         ;
 
@@ -84,7 +84,7 @@ class RemoteFilesystemTest extends \PHPUnit_Framework_TestCase
         $io = $this->getMock('Composer\IO\IOInterface');
         $io
             ->expects($this->once())
-            ->method('hasAuthorization')
+            ->method('hasAuthentication')
             ->will($this->returnValue(true))
         ;