File Extension DER

File type: DER Encoded X509 Certificate

The DER file type is primarily associated with 'DER Encoded X509 Certificate'. In cryptography, a public key certificate (or identity certificate) is a certificate which uses a digital signature to bind together a public key with an identity. The certificate can be used to verify that a public key belongs to an individual. DER or Distinguished Encoding Rules is a method for encoding a data object, such as an X.509 certificate, to be digitally signed or to have its signature verified.

When windows gives you an error message saying that it
"Cannot open DER files", this means either:

A. You need to identify a program that can open the file
B. Or your registry may be damaged

In both cases it is strongly recommended that you
run a free scan for registry errors.

'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database

System Info for File Extension .DER

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

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