Hi jakub
I think u want to send an message to multiple of receivers using asymmetric algorithm
Note that most public key algorithms are relatively computationally costly (relatively slow), in comparison with many symmetric key algorithms.
hybrid cryptosystems (public key algorithms and symmetric key algorithms) for reasons of efficiency are used;
1- in such a cryptosystem, a shared secret key ("session key") is generated by one party, this session key is then encrypted by each recipient's public key.
2- Each recipient uses the corresponding private key to decrypt the session key.
Once all parties have obtained the session key,
3- they can
use a much faster symmetric algorithm to encrypt and decrypt messages.
Reference:
Regards
Haytham
Jakub <[EMAIL PROTECTED]> wrote:
Jakub <[EMAIL PROTECTED]> wrote:
Please could somebody tell me, how do I substitute 2 different public keys?
Or, better, encrypt one message for 2 receivers at a time (or using the
combined key - the same)? (I know that i.e. RSA allows it)
Bye Jakub
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