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Microsoft PFX file format In cryptography , PKCS #12 defines an archive file format for storing many cryptography objects as a single file. It is commonly used to bundle a private key with its X.509 certificate or to bundle all the members of a chain of trust .
PKCS #7 files may be stored both as raw DER format or as PEM format. PEM format is the same as DER format but wrapped inside Base64 encoding and sandwiched in between ‑‑‑‑‑BEGIN PKCS7‑‑‑‑‑ and ‑‑‑‑‑END PKCS7‑‑‑‑‑. Windows uses the .p7b file name extension [6] for both these encodings.
See RFC 7292. Defines a file format commonly used to store private keys with accompanying public key certificates, protected with a password-based symmetric key. PFX is a predecessor to PKCS #12. This container format can contain multiple embedded objects, such as multiple certificates. Usually protected/encrypted with a password.
PEM data is commonly stored in files with a ".pem" suffix, a ".cer" or ".crt" suffix (for certificates), or a ".key" suffix (for public or private keys). [3] The label inside a PEM file represents the type of the data more accurately than the file suffix, since many different types of data can be saved in a ".pem" file.
.p12, .pfx, .pkcs12 – PKCS#12, may contain certificate(s) (public) and private keys (password protected) in a single file. .pfx – Personal Information eXchange PFX, predecessor of PKCS#12 (usually contains data in PKCS#12 format, e.g. with PFX files generated in IIS)..crl – A Certificate Revocation List (CRL). Certificate Authorities ...
In cryptography, PKCS #8 is a standard syntax for storing private key information. PKCS #8 is one of the family of standards called Public-Key Cryptography Standards (PKCS) created by RSA Laboratories.
.cer, .crt, .der – Distinguished Encoding Rules stores certificates.p7b, .p7c – PKCS#7 SignedData commonly appears without main data, just certificates or certificate revocation lists (CRLs).p12, .pfx – PKCS#12 can store public certificates and private keys
The architecture of CMS is built around certificate-based key management, such as the profile defined by the PKIX working group. CMS is used as the key cryptographic component of many other cryptographic standards, such as S/MIME , PKCS #12 and the RFC 3161 digital timestamping protocol.