9.2 Public and Private Keys: Security through Cryptography

Encryption:

• Transforming information into a special code to make it unreadable without the correct decryption method.

Decryption:

• Making encrypted information readable again using the correct key or method.

Public Key Cryptography

Public Key:

• Safe to share with anyone. Used to encrypt messages or verify digital signatures.

Private Key:

• Kept secret. Used to decrypt messages or create digital signatures.

Bitcoin Transactions

Digital Signatures:

• Created with the sender's private key, providing cryptographic proof of authenticity and ownership. Each transaction has a unique digital signature, ensuring security and preventing tampering.