File Extension DER

.DER File

File extension: DER
File type: DER Encoded X509 Certificate


Notes about the DER file extension:



Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.

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.

Detailed information for file extension DER:


Primary association: DER Encoded X509 Certificate
Mime type: application/x-x509-ca-cert, application/pkix-cert
Identifying characters Hex: 30 82 , ASCII: 0
File Identifier - TrID
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database




Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.

Technical data

To view technical data on file-extension DER click this link to expand/hide the additional area.

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.

ProgramID: CERFile, FileType: Security Certificate, AppName: Crypto Shell Extensions
EXEFile: cryptext.dll

ProgramID: certificatefile, FileType: Internet Security Certificate, AppName: Internet Control Panel

ProgramID: CERFile
EXEFile: %SystemRoot%\system32\rundll32.exe cryptext.dll,CryptExtOpenCER %1

ProgramID: CERFile
EXEFile: rundll32.exe cryptext.dll,CryptExtOpenCER %1

ProgramID: CERFile
EXEFile: rundll32.exe %SystemRoot%\ServicePackFiles\i386\cryptext.dll,CryptExtOpenCER %1


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