Answers are anticipated to require a short paragraph. Say $5-6$ lines at most. However, no minimum or maximum size is specified. Use your judgement. Stay on topic and address the question.

$.$

$6.[$S$]$ The definition of indistinguishability in Definitions $3\mathrm{.}8($page $55),3\mathrm{.}18($page $70),3\mathrm{.}21($pages $73-74)$ and $3\mathrm{.}22($page $74)$ all follow the pattern: Pr$[$Adversary success$]<=1/2+$ negl$($n$).$ It is suggested that we could equivalently state these as:

Pr$[$Adversary success$]=1/2$ neg$|($n$)($where $$ denotes plus or minus$).$ Discuss.

Slide $13$

A chooses mO $=$ On$,$ m$1=1$n

A receives the challenge ciphertext

C$==$

A queries the decryption oracle with c$\text{'}=$ where s$\text{'}$ is s with first bit

flipped

Deck$(.)$ oracle returns $10$n$-1$: mb $=$ m$0$

Deck$(.)$ oracle returns $01$n$-1$: mb $=$ ml

$7.[0]$ Consider the adversary in slide $13,$ module $5\mathrm{.}1.$ Suppose the third step is modified to flip the last bit rather than the first bit. Show that the attack still works by modifying the last step accordingly.

$($Plz do not use chat gpt plz thank you $)$

I ll do downvote if its match with chat gpt

Also ans by no $6,7$ thank u