PKCS #7: Cryptographic Message Syntax", "CMS") - ctf-isucon-newbie

PKCS #7: Cryptographic Message Syntax", "CMS")

a guideline, set of rules, on how to send messages, sign messages, etc...

https://en.wikipedia.org/wiki/PKCS_7

https://datatracker.ietf.org/doc/html/rfc2315

https://www.cryptologie.net/article/260/asn1-vs-der-vs-pem-vs-x509-vs-pkcs7-vs/