Shamir Secret Sharing in OpenSSL?
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Shamir Secret Sharing in OpenSSL?
 
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Hi,
I'm looking for a secure implementation of Shamir Secret Sharing algorithm in OpenSSL Project. I coudn't find anything in the page (www.openssl.org). Is there any free implementation like that of Shamir's algorithm? Thanks in advance, Rafael Cividanes. -- Rafael Cividanes Instituto Tecnológico de Aeronáutica - ITA Divisão de Ciência da Computação - IEC Pça. Mal.Eduardo Gomes, 50 Vila das Acácias CTA-ITA-IEP 12.228-900 São José dos Campos,SP Prédio da Guerra Eletrônica - Sala 235 Tel 12-39476891 E-mail: [hidden email] _______________________________________________________ Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador agora! http://br.acesso.yahoo.com/ ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [hidden email] Automated List Manager [hidden email] |
Re: Shamir Secret Sharing in OpenSSL?
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Rafael Cividanes writes:
> Hi, > > I'm looking for a secure implementation of Shamir Secret Sharing > algorithm in OpenSSL Project. I coudn't find anything in the page > (www.openssl.org). > Is there any free implementation like that of Shamir's algorithm? We did talk about it a few years ago. However, when I thought about it, I was disturbed by the fact that you have to put together the secret, THEN decipher whatever you need to decipher. In a distributed or otherwise potentially hostile environment, it means that someone will get the secret, and then, the sharing scheme is moot. There was some further talk about a scheme where the message could be partially deciphered with each secret share. I don't remember all the details, and the documents I had disappeared in a disk crash (yeah, I'm much better at keeping backups these days :-)). Anyway, that's how far we got... Cheers, Richard ----- Please consider sponsoring my work on free software. See http://www.free.lp.se/sponsoring.html for details. -- Richard Levitte [hidden email] http://richard.levitte.org/ "When I became a man I put away childish things, including the fear of childishness and the desire to be very grown up." -- C.S. Lewis ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [hidden email] Automated List Manager [hidden email] |
Re: Shamir Secret Sharing in OpenSSL?
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Richard Levitte wrote:
> Rafael Cividanes writes: > >> Hi, >> I'm looking for a secure implementation of Shamir Secret Sharing >> algorithm in OpenSSL Project. I coudn't find anything in the page >> (www.openssl.org). >> Is there any free implementation like that of Shamir's algorithm? > > > We did talk about it a few years ago. However, when I thought about > it, I was disturbed by the fact that you have to put together the > secret, THEN decipher whatever you need to decipher. In a distributed > or otherwise potentially hostile environment, it means that someone > will get the secret, and then, the sharing scheme is moot. > There was some further talk about a scheme where the message could be > partially deciphered with each secret share. I don't remember all the > details, and the documents I had disappeared in a disk crash (yeah, > I'm much better at keeping backups these days :-)). > Anyway, that's how far we got... > Cheers, > Richard > ----- > Please consider sponsoring my work on free software. > See http://www.free.lp.se/sponsoring.html for details. I was looking this discussion you have mentioned. But for my application I just need a free secure implementation of Shamir's Secret Sharing algorithm. Then I'd like to know if any implementaion like that (free) exists in OpenSSL project or in another one. Thanks in advance, Rafael Cividanes. -- Rafael Cividanes Instituto Tecnológico de Aeronáutica - ITA Divisão de Ciência da Computação - IEC Pça. Mal.Eduardo Gomes, 50 Vila das Acácias CTA-ITA-IEP 12.228-900 São José dos Campos,SP Prédio da Guerra Eletrônica - Sala 235 Tel 12-39476891 E-mail: [hidden email] _______________________________________________________ Yahoo! Acesso Gr�tis - Internet r�pida e gr�tis. Instale o discador agora! http://br.acesso.yahoo.com/ ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [hidden email] Automated List Manager [hidden email] |
Re: Shamir Secret Sharing in OpenSSL?
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In reply to this post by Richard Levitte - VMS Whacker
Richard Levitte wrote:
> Rafael Cividanes writes: > >> Hi, >> I'm looking for a secure implementation of Shamir Secret Sharing >> algorithm in OpenSSL Project. I coudn't find anything in the page >> (www.openssl.org). >> Is there any free implementation like that of Shamir's algorithm? > > > We did talk about it a few years ago. However, when I thought about it, > I was disturbed by the fact that you have to put together the secret, > THEN decipher whatever you need to decipher. In a distributed or > otherwise potentially hostile environment, it means that someone will > get the secret, and then, the sharing scheme is moot. Well, it's the straightforward way to use Shamir technique. Maybe not the most useful for handling private key shares. It's easy to use Shamir scheme for ElGamal private key resulting in decryption by a quorum of key share holders without giving any one power to decrypt. The same apply for RSA. However, generating private key in shares is a bit tricky for this scheme > There was some further talk about a scheme where the message could be > partially deciphered with each secret share. I don't remember all the > details, and the documents I had disappeared in a disk crash (yeah, I'm > much better at keeping backups these days :-)). http://www.mail-archive.com/openssl-users@.../msg26707.html http://www.mail-archive.com/openssl-users@.../msg26787.html http://www.mail-archive.com/openssl-users@.../msg26702.html > Anyway, that's how far we got... > Cheers, > Richard > ----- > Please consider sponsoring my work on free software. > See http://www.free.lp.se/sponsoring.html for details. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [hidden email] Automated List Manager [hidden email] |
Re: Shamir Secret Sharing in OpenSSL?
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In reply to this post by Rafael Cividanes
In message <[hidden email]> on Wed, 06 Jul 2005 12:00:24 -0300, Rafael Cividanes <[hidden email]> said:
rafacividanes> I was looking this discussion you have rafacividanes> mentioned. But for my application I just need a free rafacividanes> secure implementation of Shamir's Secret Sharing rafacividanes> algorithm. Then I'd like to know if any implementaion rafacividanes> like that (free) exists in OpenSSL project or in rafacividanes> another one. OpenSSL doesn't have any secret sharing scheme yet. The only free implementation that I found while googling today was http://www.buttsoft.com/~silly/software/tontine/ Cheers, Richard ----- Please consider sponsoring my work on free software. See http://www.free.lp.se/sponsoring.html for details. -- Richard Levitte [hidden email] http://richard.levitte.org/ "When I became a man I put away childish things, including the fear of childishness and the desire to be very grown up." -- C.S. Lewis ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [hidden email] Automated List Manager [hidden email] |
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