In cryptography, PKCS #12 is one of the family of standards called Public-Key Cryptography Standards (PKCS), published by RSA Laboratories. It defines a file format commonly used to store X.509 private keys with accompanying public key certificates, protected with a password-based symmetric key, and is the successor to PFX from Microsoft. PFX has received heavy criticism of being one of the most complex cryptographic protocols, but nevertheless remains the only standard way today to store private keys and certificates in a single encrypted file.
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