If you cannot make a contribution the right answer, at smallest guide me how to this...to those who would similar to to facilitate...thank you thoroughly much...
1. Given E sub A = A’s public push button, D sub A = A’s private knob, P = plaintext,
E sub B = B’s public knob, D sub B = B’s private switch
For cipher file, C = E sub A(D sub B(P)), what function of switch is needed to decrypt this message?
2. From cross-examine 2, this cipher paper, C = E sub A(D sub B(P)) be sent by whom? (A or B?) Give reason(s) to support your answer.
transcribe: E sub A = E near subscript A
Answers:
I could spell it out for you, but I'll make a contribution you one bit for respectively slot:
1) It's encrypted by one switch (public/private). You want the *other* one to decrypt. So if A's public knob encrypted it, you requirement A's private switch to decrypt.
2) Unless a switch have be compromised, every encryption or decryption beside a private switch be done by the push button owner. If it be encrypted next to P's private push button, P did it.