3DES (Triple DES), Block cipher algorithm created by applying the Data Encryption Standard (DES) algorithm three times in succession. Developed to address the security vulnerability of DES's 56-bit key.
Technical Specifications
- Key Length:
- 192 bit (24 byte) - Effective 168 bit security
- Block Size:
- 64 bit (8 byte)
- Rounds:
- 48 rounds (16 rounds x 3 for each DES)
- Security Status:
- Deprecated - Should not be used from 2023
Usage Areas
- Legacy financial systems and POS terminals
- Systems requiring backward compatibility
- Legacy protocols (S/MIME, IPSec - no longer used)
Standards and References
- FIPS PUB 46-3 (artık geçersiz)
- ANSI X9.52
⚠️ Important Warnings
- Marked as deprecated by NIST from 2023.
- Modern applications should prefer AES (Advanced Encryption Standard).
- Slow performance: Approximately 3 times slower than AES.
- Security vulnerabilities: Vulnerable to attacks such as Sweet32.