Re: lockable trapdoor one-way function

From: Paul Rubin (//phr.cx_at_NOSPAM.invalid)
Date: 11/27/03 

Date: 27 Nov 2003 11:39:16 -0800

Peter Fairbrother <zenadsl6186@zen.co.uk> writes:
> Does anyone know of a trapdoor one-way function whose trapdoor can be locked
> after use?
>
> It can be done with secure hardware and/or distributed trust, just delete
> the trapdoor key, and prove (somehow?) you've deleted it.
>
> It looks hard to do in "trust-the-math-only" mode...

Um, using the trapdoor means using a secret parameter that it has.
Locking it means proving you no longer know the secret parameter.
Without secure hardware, how do you prove you don't know something?

Relevant Pages

  • Re: lockable trapdoor one-way function
    ... > Does anyone know of a trapdoor one-way function whose trapdoor can be ... > It can be done with secure hardware and/or distributed trust, ... party alone has the entire secret trap door data. ...
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  • lockable trapdoor one-way function
    ... Does anyone know of a trapdoor one-way function whose trapdoor can be locked ... It can be done with secure hardware and/or distributed trust, ... Peter Fairbrother ...
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