It depends on the web service you are trying to call. If the web service require authentication, then the client must supply authentication credentials.
It is optional to implement authentication in a web service - you can have web services without any kind of authentication. Authentication may not be necessary if the web service is published to a private network.
just a follow up question. if the the WS-Security implementation uses Keys. how would the service know which client is accessing him. I mean if each of the client has different key (unique for everyone) and the service has only one service.key to signed all the clients. please enlighten.
posted 8 years ago
There are two options available (as far as I know) concerning keys:
- If you use a symmetric cipher, then the clients and server share a common secret key which can be used to encrypt/decrypt and/or sign messages.
- If you are using an asymmetric cipher, then the server must have the public keys of all the clients, in order to be able to determine if a client's private key has been used to encrypt and/or sign some data.
Hope this answers some of your questions!