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added help output in README
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README.md
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README.md
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@ -15,12 +15,12 @@ a phone to operate properly.
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security?
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---------
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Paper is not less secure than an phone running a software token. With
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Paper is not less secure than a phone running a software token. With
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a sheet paper and a pencil, you have the control of the token. Do you
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have the control of your phone and the software running on it?
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For a negligible cost, you have a token and you just need to protect
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that sheet of paper.
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that sheet of paper. It's simple.
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An OTP is just an one-time password and this recommendation makes a
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lot of sense for the paper-based token too :
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@ -40,6 +40,18 @@ how to use it
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perl paper-token.pl --output test.pdf --counter 0 --end 200 --secret 3132333435363738393031323334353637383930 --digits 6
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paper token - http://www.foo.be/paper-token/ v0.1
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usage: paper-token.pl [options]
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options
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-h, --help This help message
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-s, --secret Secret of the token in hex format - default is RFC 4226 test vector
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-o, --output Output filename
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-c, --counter Starting counter - default is 0
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-e, --end Ending counter - default is 500
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-w, --window Window of authentication (one line) - default is 14
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-d, --digits Digits showed per OTP value - default is 6 - dec31.6
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--man Display documentation
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sample token (PDF)
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==================
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