ASN.1 / DER / PEM / X.509 / PKCS #7
ASN.1 vs DER vs PEM vs x509 vs PKCS#7 vs ....
https://www.cryptologie.net/article/260/asn1-vs-der-vs-pem-vs-x509-vs-pkcs7-vs/
A Warm Welcome to ASN.1 and DER
https://letsencrypt.org/docs/a-warm-welcome-to-asn1-and-der/
Recovering a full PEM Private Key when half of it is redacted
https://blog.cryptohack.org/twitter-secrets
ASN.1 と DER へようこそ
https://letsencrypt.org/ja/docs/a-warm-welcome-to-asn1-and-der/
ASN.1 JavaScript decoder
https://lapo.it/asn1js/
ASN.1 Decoder
https://holtstrom.com/michael/tools/asn1decoder.php
Cyberchef
https://gchq.github.io/CyberChef/
PEM形式をHEXに変換できる
#PKCS PKCS #7: Cryptographic Message Syntax", "CMS")