A practical guide

Public-key cryptography uses a related pair of keys. A public key can be shared; a private key must remain secret. Depending on the protocol, the pair can support encryption, identity proofs, or digital signatures. The precise use matters: these functions are related but not interchangeable.A {digital signature|digital-signature} can help verify that data was signed by the holder of a key.digital signature

What to know

For a blockchain wallet, control of the private key can control the associated assets. That makes secure storage and recovery important. Never paste a private key or recovery phrase into a support chat or an unknown website.Read the {wallet safety guide|wallet} and {account security guide|security}.wallet safety guideaccount security guide

Using this information

Do not assume every game login uses a blockchain key. Follow the sign-in and payment instructions shown by the service, and confirm the domain before entering credentials. UIGame’s {FAQ|faq} and current platform pages are the right place to check how its features work.FAQ