This episode will explain you the major topics about cryptography :Hiding ≠ ProtectingSteganography conceals a message’s existence (wax tablets, watermarked films).Coding just changes symbols (Morse, CD error-correction).Cryptography actually locks the content.Early & Perfect CiphersCaesar shift is weak; a one-time pad is unbreakable but impractical because the key must match the message length.Kerckhoffs’ rule: everything about a system can be public—only the key must stay secret.Enigma showed strong design (159 quadrillion settings) yet fell to Turing owing to predictable message parts.Modern cryptoSymmetric keys are fast but need a safe key swap.RSA (public/private keys) solves that, enabling HTTPS, digital signatures, and secure web traffic.Hashes act as digital fingerprints; signing = encrypting a hash with the private key.Future challenges2048-bit RSA is safe now, but quantum computers could break it.Post-quantum and homomorphic encryption aim to keep data secure—even while processed in the cloud.Bottom line: robust math plus open scrutiny—not secrecy—keeps our digital world safe, but we must adapt as computing power grows.Hosted on Ausha. See ausha.co/privacy-policy for more information.

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