Security

Formats specific to the storage and transmission of security information. See also Encryption.

Digital Certificates

 * ASCII Armor (.arm; old for base64)
 * Canonical Encoding Rules (.cer)
 * Certificate File (.crt)
 * Certificate Revocation List (.crl)
 * Certificate Signing Request (.csr)
 * Certificate Trust List (.stl)
 * Cryptographic Message Syntax Standard (.p7b, .p7r, .spc; PKCS #7)
 * Distinguished Encoding Rules (.der)
 * Microsoft Serialized Certificate Store (.sst)
 * Personal Information Exchange Format (.p12, .pfx)
 * Privacy-enhanced Electronic Mail (.pem)
 * Private Key (.key)

App provisioning and DRM

 * Mobile Provision file (.mobileprovision; used for installing iOS apps)