Exercises

Every exercise from the courses, in one place. Search for a specific one, filter by subject, or let chance pick one for you.

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Flash questionsShort drills on core skills, as cards to project or print.See the series

1120 exercises

How the Internet works

Informatique – Réseaux4 exercises

The layer that routes

Short answerAdvanced

The counter that protects the network

The top of the DNS hierarchy

The order of the handshake

Finite automata

Informatique – Théorie4 exercises

Recognizing an accepting state

Short answerAdvanced

The starting point

Trace on « aba »

Open answerAdvanced

The equivalent regular expression

The one-time pad and perfect secrecy

Cryptographie – Fondamentaux4 exercises

Unbreakable, really?

Short answerAdvanced

Computing a XOR

Which golden rule is violated?

Open answerAdvanced

Explaining the danger of reuse

Block ciphers and their modes

Cryptographie – Symétrique4 exercises

ECB's Achilles heel

Short answerAdvanced

Counting the blocks after padding

The signature of CTR mode

Open answerAdvanced

The mortal sin: reusing a nonce

AES, the Encryption Standard

Cryptographie – Symétrique4 exercises

Confusion and diffusion in AES

Short answerAdvanced

The number of rounds of AES-256

Why AES-128 remains secure

Open answerAdvanced

The importance of the avalanche effect

Hash functions: construction and attacks

Cryptographie – Intégrité4 exercises

Recovering a password

Short answerAdvanced

The size of SHA-256

The cost of a collision

Open answerAdvanced

Why ban MD5