TechEnglish
Asymmetric Encryption & Digital Signatures
Why public-key cryptography needs two keys, which one does what, and how running the pair backwards turns encryption into a signature.
Froga8 blocks
TechEnglish
Symmetric Encryption & Classical Ciphers
From Caesar's shift cipher to AES: what a cipher and a key actually are, why classical ciphers fall to frequency analysis, and why modern block ciphers replaced DES.
Froga10 blocks
TechEnglish
Public Key Infrastructure (PKI)
Learn how trust is built on the internet. Explore how public–private key pairs, digital certificates, and Certificate Authorities work together to authenticate identities, secure communication, and prevent tampering.
Froga4.0(1)
8 blocks