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The CryptoKeyPair dictionary of the Web Crypto API represents a key pair for an asymmetric cryptography algorithm, also known as a public-key algorithm. A CryptoKeyPair object can be obtained using , when the selected algorithm is one of the asymmetric algorithms: RSASSA-PKCS1-v1_5, RSA-PSS, RSA-OAEP, ECDSA, or ECDH. It contains two properties, which are both objects: a privateKey property containing the private key and a publicKey property containing the public key.

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Properties

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publicKey

publicKey: CryptoKey A object representing the private key. For encryption and decryption algorithms, this key is used to decrypt. For signing and verification algorithms it is used to sign.

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privateKey

privateKey: CryptoKey A object representing the public key. For encryption and decryption algorithms, this key is used to encrypt. For signing and verification algorithms it is used to verify signatures.
Last modified on July 22, 2026