X-Git-Url: http://git.pjr.cc/?p=ga4php.git;a=blobdiff_plain;f=doco%2Freadme.txt;fp=doco%2Freadme.txt;h=75bd4acd4a71a949be696d51c8b95fa54f9450db;hp=1ab3a1e186ecbebe7c0e2fbf55c99fb24b5ca704;hb=9b2752526f9f4bfac4831eb61fa63edd60117f77;hpb=08bcb2d016d684539e10a0628a5674544b2596b5

diff --git a/doco/readme.txt b/doco/readme.txt
index 1ab3a1e..75bd4ac 100644
--- a/doco/readme.txt
+++ b/doco/readme.txt
@@ -42,4 +42,13 @@ hex, this I do by converting to binary first... Lets how thats
 going to work in the long run. The sad thing is is that if I
 were writing it in C/C++/etc, bit math is easy and while im sure
 its not too different in PHP, I've never done it, so this seeemed
-easier.   
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+easier.   
+
+
+Acknowledgements
+================
+
+Google, for producing google authenticator
+The guys at mOTP who got me all excited about token authenticators
+The guys on this page who spell out how to do hotp
+	http://php.net/manual/en/function.hash-hmac.php
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