Cryptography with one public and one private key?

Asymmetric cryptography, also known as public-key cryptography, is a cryptographic system that uses a pair of mathematically related keys: a public key and a private key. The public key can be shared with anyone, while the private key must be kept secret by its owner.These two keys perform complementary functions. For example, when someone wants to send encrypted information securely, they can use the recipient’s public key to encrypt the data. Only the recipient’s corresponding private key can decrypt it. Asymmetric cryptography is also used for digital signatures, where the private key is used to create a signature and the public key is used to verify it.