) One student claims to have invented a new security protocol. Given a hash function 𝐻, a symmetric encryption k
Posted: Sun May 15, 2022 12:27 pm
) One student claims to have invented a new security protocol.
Given a hash function π», a symmetric encryption key algorithm πΈ,
and two secret keys πΎ1 and πΎ2 known only to the sender and
receiver, the sender converts a message π into the message π = πΈπΎ1
(π β π»(πΎ2 β π)), where β denotes concatenation. Can this protocol
guarantee
i) confidentiality?
ii) non-repudiation?
iii) data integrity
Given a hash function π», a symmetric encryption key algorithm πΈ,
and two secret keys πΎ1 and πΎ2 known only to the sender and
receiver, the sender converts a message π into the message π = πΈπΎ1
(π β π»(πΎ2 β π)), where β denotes concatenation. Can this protocol
guarantee
i) confidentiality?
ii) non-repudiation?
iii) data integrity