The University of SydneyPage 45simple digital signature for message m:–Bob signs m by encrypting with his private key KB, creating “signed”message, KB(m)--Dear AliceOh, how I have missed you. I think of you all the time! …(blah blah blah)BobBob’s message, mPublic keyencryptionalgorithmBob’s privatekey K B-Bob’s message, m, signed (encrypted) with his private keym,K B-(m)Digital signatures