Abstract: A message sending method is disclosed. The message sending method includes: sending a client handshake message to a server, where the client handshake message carries identifiers of server certificates buffered by the client; receiving a server handshake message sent by the server, where when the server determines that the identifiers of the server certificates buffered by the client include an identifier of a certificate that the server is ready to use, the server handshake message carries the identifier of the certificate that the server is ready to use; searching for the server certificate corresponding to the identifier of the certificate that the server is ready to use, among the server certificates buffered by the client; and encrypting, by using a public key in a server certificate found by searching, a client key exchange message to be sent, and sending an encrypted client key exchange message to the server.

Abstract: A pipelined Fast Hadamard Transform ("FHT") architecture is disclosed that comprises log.sub.2 N identical pipeline stages, which are ideally suited for implementation in application-specific integrated circuits. One 2-port stage of the first illustrative embodiment of the present invention advantageously comprises: a first input for sequentially receiving N incoming correlation signals, I(i), at cycle i, wherein the N incoming correlation signals are based on N Walsh chips; a processor for generating N outgoing correlation signals based on the N incoming correlation signals, I(i); and a first output for sequentially outputting the N outgoing correlation signals, O(i); wherein ##EQU1## k=(i-N/2).