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ECES practice questions - frequently asked questions

Plain answers about how ECES Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real ECES exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The ECES exam spans 5 domains: Introduction and History of Cryptography (8% of the exam); Symmetric Cryptography and Hashes (44% of the exam); Number Theory and Asymmetric Cryptography (14% of the exam); Applications of Cryptography (24% of the exam); Cryptanalysis (10% of the exam). Every practice question on this site is tagged to one of these domains.

The domains are not weighted equally on the exam. By share of the marks: Symmetric Cryptography and Hashes 44%; Applications of Cryptography 24%; Number Theory and Asymmetric Cryptography 14%; Cryptanalysis 10%; Introduction and History of Cryptography 8%.

The ECES exam has 50 questions and is completed in 2 hours. Our timed practice mirrors that length and pacing, so exam day feels familiar.

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