Public key security involves a system that uses pairs of cryptographic keys for secure communication and transactions. Each user generates two keys: a public key, which can be shared with others, and a private key, which must be kept secret.The public key acts as an address for receiving funds or messages. Anyone can send transactions to this address, but only the owner, who possesses the private key, can access and manage those funds. This ensures that only authorized users can control their assets, even if the public key is visible to everyone.The strength of public key security lies in its encryption. The private key is mathematically linked to the public key, making it nearly impossible to derive the private key from the public key alone. This system creates a secure environment for transactions while protecting user identities.To maintain security, it is crucial for users to keep their private keys confidential. If someone gains access to a private key, they can control the associated funds, leading to potential loss. Overall, public key security is foundational for safe transactions and user privacy.