Cryptocurrencies in today's world

What could be wrong with cryptocurrencies?

• A centralized system

• Slow transactions

• Risk of fraud

• Lack of governance

Cryptocurrencies are based on a decentralised digital system called?

• The webchain

• The blockchain

• The stockchain

• The netchain

Where can we store the coins we have?

• On a savings account

• In a secure digital portfolio

• Under your bed

• On crypto buy/sell sites

Where does the word « crypto » come from in cryptocurrencies?

• Cryptopolymarphisms 

• Cryptogamy

• Cryptography

• Cryptornithorync

What ensures cryptography in cryptocurrencies ?

• confidentiality of exchanged data, data integrity & governance

• authentication of exchangers, confidentiality, data integrity & non-repudiation

• governance, centralization of power & data integrity

• centralization of power & authenticity

Why is asymmetric key cryptography prefered to the symmetric one ?

• Because in symmetric key cryptography the shared secret must be shared in a secure way, and that is difficult

• Because the asymmetric one is more simple to understand

• Because in the symetric one we have to use the private keys of people communicating

What does the asymmetric key cryptography introduce ?

• Human signatures

• Digital signatures

• Computer signatures

• Governance signatures

Which cryptocurrencies enable decentralised applications and smart contracts to run ?

• NEO, ADA & XRP

• NEO, ADA & RippleNet

• ADA, Ether & NEO

• XRP, NEO & Bitcoin

When was Bitcoin invented ?

• 11 years ago

• 12 years ago

• 13 years ago

• 14 years ago

What does the word ICO mean ?

• Iconic Coin Offering

• Instant Coin Offering

• International Coin Offering

• Initial Coin Offering