Re: blinding BF IBE CA assisted credential system (Re: chaum's patent expiry?)

2004-05-10 Thread Jason Holt
On Mon, 10 May 2004, Adam Back wrote: On Mon, May 10, 2004 at 03:03:56AM +, Jason Holt wrote: [...] Actually, now that you mention Chaum, I'll have to look into blind signatures with the BF IBE (issuing is just a scalar*point multiply on a curve). I think you mean so that the

Re: blinding BF IBE CA assisted credential system (Re: chaum's patent expiry?)

2004-05-10 Thread Adam Back
But if I understand that is only half of the picture. The recipient's IBE CA will still be able to decrypt, tho the sender's IBE CA may not as he does not have ability to compute pseudonym private keys for the other IBE CA. If you make it PFS, then that changes to the recipient's IBE CA can get

blinding BF IBE CA assisted credential system (Re: chaum's patent expiry?)

2004-05-10 Thread Adam Back
On Mon, May 10, 2004 at 03:03:56AM +, Jason Holt wrote: [...] Actually, now that you mention Chaum, I'll have to look into blind signatures with the BF IBE (issuing is just a scalar*point multiply on a curve). I think you mean so that the CA/IBE server even though he learns pseudonyms

blinding BF IBE CA assisted credential system (Re: chaum's patent expiry?)

2004-05-10 Thread Adam Back
On Mon, May 10, 2004 at 03:03:56AM +, Jason Holt wrote: [...] Actually, now that you mention Chaum, I'll have to look into blind signatures with the BF IBE (issuing is just a scalar*point multiply on a curve). I think you mean so that the CA/IBE server even though he learns pseudonyms

Re: blinding BF IBE CA assisted credential system (Re: chaum's patent expiry?)

2004-05-10 Thread Adam Back
But if I understand that is only half of the picture. The recipient's IBE CA will still be able to decrypt, tho the sender's IBE CA may not as he does not have ability to compute pseudonym private keys for the other IBE CA. If you make it PFS, then that changes to the recipient's IBE CA can get