Thank u all for the prompt response.

I understand theortically what cross certification is. But what I didnt
understand practically how we can achieve.

Cross certification means 
very brief definition -- cross certify (root CA's) with each other.

Practically how it is possible...... 
1Q.  Assume both parties have self signed certificates (root CA's), how
they will cross certify each other? 

2Q. For cross certification, If each Root CA send their certificate
Requests to each other. How it is possible to cross certify without
having any existing CA certificate? 

3Q. will Cross certified root certificate contain two signatures (one is
self signed signature, other is signature of cross certified CA)? (but
as per x509 standards, there will be only one signature part)

4Q. Both root CA's have chain of sub-ca's and issue digital certificates
independently. After some time, both root CA's want to establish trust
with each other (if they get cross certified), 

Is there any implication on the existing digital certificates issued by
root CA's or will they have to get new certificates? I have no idea at
all....

If I am wrong, please correct me.

Hi Oscar Jacobsson, I will be very happy if you provide the document
(tutorial) on cross certificate work. By seeing ur mail, i got confident
that we can achieve/develop cross certification software using OpenSSL.


Thanks & Regards,
Ravi Prakash B.V.



Oscar Jacobsson wrote:
> 
> I guess it depends on exactly what you mean by interdependent CAs. Are
> you referring to cross-certification between different CA products, or
> were you more interested in cross certification in general?
> 
> I've done a bit cross certification work using OpenSSL for a piece of
> software I'm currently working on, so I guess I could hack up a quick
> tutorial document if you're interested. I haven't really played around
> with any CA products as of late, however, so I can't comment on how
> interoprable the stuff I can whip up with OpenSSL is.
> 
> //oscar
> 
> "Ravi Prakash B.V." wrote:
> >
> > Dear All,
> >
> > I do not receive any reply for this.
> > Any pointers will be appreciated.
> >
> > Ravi Prakash B.V.
> >
> > "Ravi Prakash B.V." wrote:
> > >
> > > Dear all,
> > >
> > > I want to establish cross certification between two different independent
> > > CAs. How is it possible?
> > >
> > > Any pointers/links/docs for the above.
> > >
> > > Thanks in Advance,
> > > Ravi Prakash B.V.
> > >
> > > ______________________________________________________________________
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> ______________________________________________________________________
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