
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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![Consider a simple authentication protocol below.
A simple authentication protocol
(1) CAS: III || PI || III
(2) AS → C: TTTTTT
(3) C➜ V: III || TT
TTTTTT= E (KI, [III || PI || III])
where C = client, AS = authentication server, V= server, IDC = identifier of user on C,
IDV= identifier of V, PC = password of user on C, KV = secreț encryption key shared by AS
and V
i.
11.
What are the two main problems in this simple protocol?
Suggest possible improvements to the protocol to address the problems.](https://content.bartleby.com/qna-images/question/7b0e677c-a4d6-4799-a33a-5ba4d60b506e/bf8b29b4-6ce4-404b-bf40-6b72c228bd34/ncjtm5n_thumbnail.png)
Transcribed Image Text:Consider a simple authentication protocol below.
A simple authentication protocol
(1) CAS: III || PI || III
(2) AS → C: TTTTTT
(3) C➜ V: III || TT
TTTTTT= E (KI, [III || PI || III])
where C = client, AS = authentication server, V= server, IDC = identifier of user on C,
IDV= identifier of V, PC = password of user on C, KV = secreț encryption key shared by AS
and V
i.
11.
What are the two main problems in this simple protocol?
Suggest possible improvements to the protocol to address the problems.
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