README.md in otp-0.0.7 vs README.md in otp-0.0.8
- old
+ new
@@ -2,18 +2,13 @@
[](https://travis-ci.org/gotoyuzo/otp)
[](https://rubygems.org/gems/otp)
[](https://github.com/gotoyuzo/otp/blob/master/LICENSE.txt)
-This library provides an implementation of
-HMAC-Based One-Time Password Algorithm (HOTP; RFC4226) and
+This library provides an implementation of HMAC-Based One-Time Password Algorithm (HOTP; RFC4226) and
Time-Based One-Time Password Algorithm (HOTP; RFC6238).
-The Algorithm details can be referred at the following URLs.
-* HOTP: http://tools.ietf.org/html/rfc4226
-* TOTP: http://tools.ietf.org/html/rfc6238
-
## Usage
To create new TOTP secret:
require "otp"
@@ -41,10 +36,22 @@
totp = OTP::TOTP.new
totp.secret = "YVMR2G7N4OAXGKFC"
p totp.verify("123456") #=> true/false (verify given passowrd)
-The value of "secret" is encoded with BASE32 algorithm to be compatible
-with Google Authenticator URI format.
+You can use the last and post option parameters to verify several generations, including before and after the current password.
-* BASE32: http://tools.ietf.org/html/rfc4648
-* Google Authenticator Key URI format: https://github.com/google/google-authenticator/wiki/Key-Uri-Format
+ # verify passwords from last 2 generation to post 1 generation
+ p totp.verify("123456", last: 2, post: 1)
+
+## Related Information
+
+TOTP and HOTP algorithm details can be referred at the following URLs.
+
+* HOTP: An HMAC-Based One-Time Password Algorithm - http://tools.ietf.org/html/rfc4226
+* TOTP: Time-Based One-Time Password Algorithm - http://tools.ietf.org/html/rfc6238
+
+In the OTP URI format, the value of "secret" is encoded with BASE32 algorithm.
+The Format details are described in the document of Google Authenticator.
+
+* The Base16, Base32, and Base64 Data Encodings - http://tools.ietf.org/html/rfc4648
+* Google Authenticator Key URI format - https://github.com/google/google-authenticator/wiki/Key-Uri-Format