Session01

A public/private key pair is created using asymmetric cryptography, where two mathematically related keys are generated together. What is the Public Key? The public key is the key that can be shared openly with anyone. It is used to: Encrypt data that only the corresponding private key can decrypt. Verify digital signatures created with the private key. What is the Private Key? The private key is a secret key that must be kept confidential by its owner. It is used to: Decrypt data encrypted with the corresponding public key. Create digital signatures that can be verified using the public key. What Can This Key Pair Be Used For? A public/private key pair can be used for: Secure Communication – Encrypting messages so that only the intended recipient can read them. Digital Signatures – Proving the authenticity and integrity of documents or messages. Authentication – Verifying the identity of users or devices. Secure Websites (SSL/TLS) – Protecting information transmitted over the internet. Cryptocurrencies – Managing ownership and transactions of digital assets. Why Must the Private Key Be Protected? The private key must be protected because: Anyone who obtains the private key can decrypt confidential information intended for the key owner. An attacker can impersonate the key owner by creating fraudulent digital signatures. Unauthorized access to the private key can compromise accounts, systems, and sensitive data. Loss or theft of the private key can lead to security breaches and identity theft. In summary: The public key is meant to be shared, while the private key must remain secret. The security of the entire public-key cryptography system depends on keeping the private key protected.