How to modify bob''s behaviour to prevent this threat

Assignment Help Computer Engineering

Reference no: EM1334108

Suppose we are using Lamport's hash, and Bob's system crashes before receiving Alice's reply to a message. Further suppose an intruder, Trudy, can eavesdrop and detect that Bob crashed (maybe Trudy can even cause Bob to crash). This would create a situation where Trudy has Alice's reply (which Bob did not receive) and which Trudy can use to impersonate Alice, assuming Trudy logs in before Alice attempts to log into Bob again. How can we modify Bob's behaviour to prevent this threat, and exactly when would we overwrite Bob's database, and with what?

Reference no: EM1334108

Questions Cloud

Value of straight-debt : Thomson Engineering is issuing new 30-year bonds that have warrants attached. Which have a par value of $1,000. What is the value of the straight-debt portion of the bonds?

Write down a simple near procedure : Write down a simple near procedure (such as a return) and call it using register addressing.

Use top down or bottom up analysis : If you were to analyze a security, would you use top-down or bottom-up analysis? Why?

Age and religious discrimination : Age and Religious Discrimination -Show at least 3 action items that supervisors should address, given the existence of the FMLA.

How to modify bob''s behaviour to prevent this threat : imagine we are using Lamport's hash, and Bob's system crashes before receiving Alice's reply to a message. Further suppose an intruder, Trudy, can eavesdrop and detect that Bob crashed (maybe Trudy can even cause Bob to crash).

Discussing the lawyer billing ethics : In your opinion what are the incentives for a lawyer or paralegal to take the high road on billing and not nickel and dime a client to death?

Describe case study- how to transition to new technology : Describe Case Study- How to Transition to New Technology and What decision criteria should you consider as you decide how to transition to Web 2.0

Qualitative and quantitative research : Is it possible that in some stiuations qualitative research may be sufficient (in the sense that there may be no need to do a follow-up quantitative study?

Cost allocation methods influence decisions of organization : How could cost allocation methods influence decisions of an organization?

User Account

All Pages