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1. ### Protocols insecure against Replay Attack

Homework Statement Determine which of the following protocols are insecure against replay attack , and explain why: (a) A → B : username, password (b) A → B : username, h(timestamp, password) (c) A → B : username, timestamp, h(password) (d) A → B : username...
2. ### Engineering Solving an RC circuit question using Superposition

Yungman I made a mistake above. The current due to the capacitor is 16.666 eLaTeX Code: ^{-t/120} not - 16.666 eLaTeX Code: ^{-t/120}. However in the book instead of adding the current....they are subtracting them. This is what i dont get since both currents ( current due to the 8V voltage...
3. ### Engineering Solving an RC circuit question using Superposition

Hello, The circuit attached below is from Richard Dorfs Intro to Electric Circuits book. The switch is shut for a long time and opened at t=0. The question asks to find the i(t) across R11, which they use nodal analaysis and find it to be 66.67 - 16.666 e^{-t/120} micro Amps, where 66.67 micro...