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DMAC

Double MAC (DMAC) using two-key derivation for enhanced CBC-MAC security. Designed for real-time data sources with variable-length messages.

Properties

Property	Value
Category	Message Authentication
Sub-category	Block Cipher MAC
Security status	🎓 Educational Only
Complexity	Intermediate
Inventor	Erez Petrank, Charles Rackoff
Year	1997
Origin	Not specified
Source	algorithms/mac/dmac.js

Parameters

Parameter	Supported values
MAC sizes	8 bytes (64 bits)

Capabilities

Flag	Value
NeedsKey	Yes

Security

Status: 🎓 Educational Only

No vulnerabilities are recorded for this implementation.

Documentation

• CBC MAC for Real-Time Data Sources (IACR ePrint 1997/010)
• Crypto++ DMAC Implementation

References

• Crypto++ Validation Tests
• NIST SP 800-38B - CMAC (modern successor)

Test vectors

1 vector ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — Crypto++ DMAC<DES> Test Vector

Field	Value
key	0123456789abcdef
input	37363534333231204e6f77206973207468652074696d6520666f7220
expected	3580c5c46b8124e2

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