diff -r 0a6527af039b -r 60e4cbbb5128 MYSymmetricKey.h
--- a/MYSymmetricKey.h	Sat Apr 04 20:42:03 2009 -0700
+++ b/MYSymmetricKey.h	Sat Apr 04 22:56:13 2009 -0700
@@ -12,9 +12,17 @@
 
 @interface MYSymmetricKey : MYKey <MYEncryption, MYDecryption>
 
+/** Initializes a symmetric key from the given key data and algorithm. */
+- (id) initWithKeyData: (NSData*)keyData
+             algorithm: (CCAlgorithm)algorithm;
+
+/** Randomly generates a new symmetric key, using the given algorithm and key-size in bits.
+    The key is not added to any keychain; if you want to keep the key persistently, use
+    the method of the same name in the MYKeychain class. */
 + (MYSymmetricKey*) generateSymmetricKeyOfSize: (unsigned)keySizeInBits
                                      algorithm: (CCAlgorithm)algorithm;
 
+/** The key's algorithm. */
 @property (readonly) CCAlgorithm algorithm;
 
 @end