The key pair direct access to the bitcoin on the blockchain, made form cryptography. For each bitcoin key pair, there is a public and private key. Read on for more details on bitcoin keys.
For starters, it would help to have some background understand about the bitcoin private key. There are 256 bits in a bitcoin private key. This secret number permits bitcoin to be unlocked and sent. Every private key is made to create a unique signature. This feature is critical as it permits the transaction of the bitcoin owner. There term private key is from its purpose; it is meant to be confidential.
This is not the same with the bitcoin public key. Similar to the bitcoin private key; it is a vast number. But, it only allows the bitcoin to be locked and received. It get its name from the fact that it is meant for public sharing. It enables you to access money.
To many, the draw line between a bitcoin private and public key is still a foreign concept. There have been explanations to draw out the differences, but they have ended up making them harder. Information about digital signatures, signing transactions and wallet import formats are not helpful to normal users. It is possible for them to know more about keys in bitcoin in understandable explanations easily.
To understand the concept, it would help if you imagine the public key cryptography is a lock. But, the lock uses two keys rather than one. Let the lock to have three points, A, B and c. When the key moves from B to A, it represents lock and receive, which is a public key. However, the moving from point B to C shows unlocking or sending, which is only done by a private key. By this explanation, you can readily trust the key system.
Even with the differences between the two keys, they have a relationship. The relationship is based on the secp256k1 elliptic curve. Since the private key is randomly generated on the curve; the public key is the corresponding number on the curve.
It is also essential to have an idea of where bitcoin keys and addresses come from. The bitcoin wallet software creates the wallet file, addresses, and keys for all their unique users. The private key is generated from a section of the same software, which can accommodate many numbers. The section also randomly generates these numbers. There are millions and millions of private keys. The security of bitcoin operates on the principle that the number of possible keys are so large for someone to the same private keys twice.