Distinguished Encoding Rules
General Information
| Title | DER File Extension |
| Extension | .der |
| Full Form | Distinguished Encoding Rules |
| File Type | Binary Data File |
| Developer | ITU-T |
| MIME Type | application/x-x509-ca-cert |
File Function
| Primary Function | Store certificate |
| Additional Functions | Public key, CA information |
| Features | Binary format, ASN.1 |
File Characteristics
| Quality | High-security |
| Supports Layers | N/A |
| Supports Transparency | N/A |
| Editable | No |
Use Cases
| SSL/TLS Certificates | Yes |
| Email Encryption | Yes |
| Code Signing | Yes |
Security and Practices
| Security Risks | Impersonation |
| Best Practices | Certificate validation, Private key protection |
Historical/Version Information
| Standardization | X.690 (1988) |
| Latest Update | X.690 (2015) |
Associated Types
| Similar Extensions | .pem, .crt, .cer |
Software Compatibility
| Software | Usage Policy | OS Compatibility |
|---|---|---|
 Microsoft Windows |
Windows | |
 Apple macOS |
Mac | |
 OpenSSL |
Free | Windows, Mac, Linux |