diff --git a/main.c b/main.c
index 6758190..be3007e 100644
--- a/main.c
+++ b/main.c
@@ -169,7 +169,7 @@ static void usage(void)
 	print_output("General options:\n");
 	print_output("     -c            check integrity of file written on decompression\n");
 	print_output("     -d            decompress\n");
-	print_output("     -e            password protected encryption on compression\n");
+	print_output("     -e            password protected sha512/aes128 encryption on compression\n");
 	print_output("     -h|-?         show help\n");
 	print_output("     -H            display md5 hash integrity information\n");
 	print_output("     -i            show compressed file information\n");
diff --git a/man/lrzip.1 b/man/lrzip.1
index f17347c..1a53c57 100644
--- a/man/lrzip.1
+++ b/man/lrzip.1
@@ -34,6 +34,7 @@ Here is a summary of the options to lrzip\&.
 General options:
   \-c            check integrity of file written on decompression
   \-d            decompress
+  \-e            password protected sha512/aes128 encryption on compression
   \-h|\-?         show help
   \-H            display md5 hash integrity information
   \-i            show compressed file information
@@ -93,6 +94,17 @@ Decompress. If this option is not used then lrzip looks at
 the name used to launch the program. If it contains the string
 "lrunzip" then the \-d option is automatically set.
 .IP
+.IP "\fB-e\fP"
+Encrypt. This option enables high grade password encryption using a combination
+of multiply sha512 hashed password, random salt and aes128 CBC encryption.
+Passwords up to 500 characters long are supported, and the encryption mechanism
+used virtually guarantees that the same file created with the same password
+will never be the same. Furthermore, the password hashing is increased
+according to the date the file is encrypted, increasing the number of CPU
+cycles required for each password attempt in accordance with Moore's law, thus
+making the difficulty of attempting brute force attacks proportional to the
+power of modern computers.
+.IP
 .IP "\fB-h|-?\fP"
 Print an options summary page
 .IP