Update README.md

README.md

@@ -1,9 +1,8 @@
 # aes-file-encrypt
 
-A basic implementation of AES 128 in ECB mode using PKCS5 padding to encrypt files.
+A basic implementation of AES 128/192/256 in ECB mode using PKCS5 padding to encrypt files.\
+TODO: More Secure Modes, Multithreaded ECB
 
-TODO: Larger Key Sizes (192/256), More Secure Modes
-
 # Compiling
 
 Compiling requires g++ and GNU Make
@@ -14,8 +13,15 @@ Remove the compiled classes and executable with `make clean`.
 
 # Using
 
-`./aesf <enc | dec> <input_file> <output_file> <options>` will prompt for an AES 128 key in hex format, ex. `00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F`
+`./aesf <enc | dec> <input_file> <output_file> <options>`\
+will prompt for an AES 128 key in hex format, ex. `00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F`
 
-Alternatively, a key may be specified as a command line option with the use of `-k`,
+# Options
 
-ex. `./aesf <enc | dec> <input_file> <output_file> -k 000102030405060708090A0B0C0D0E0F`
+A key may be specified as a command line option with the use of `-k`,\
+ex. `./aesf <enc | dec> <input_file> <output_file> -k 000102030405060708090A0B0C0D0E0F`\
+(Default: Prompt For Key)
+
+The key size (128/192/256) may be specified with the use of `-s`,\
+ex. `./aesf <enc | dec> <input_file> <output_file> -s 256 -k 1122334455667788990011223344556611223344556677889900112233445566`\
+(Default: 128)