SPKAC stands for "Signed Public Key and Challenge." It is a format primarily used in public key cryptography to encode a public key along with additional information, typically a challenge that serves as a nonce to prevent replay attacks. SPKAC is often used in conjunction with certificates and can simplify the process of obtaining a certificate from a Certificate Authority (CA). The main components of an SPKAC include: 1. **Public Key**: The public key of the entity requesting a certificate.
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