VMPC-MAC
Message authentication code based on VMPC stream cipher permutation with enhanced state mixing. Uses 32-byte accumulator and four mixing registers for 20-byte MAC output.
Properties
| Property |
Value |
| Category |
Message Authentication |
| Sub-category |
Stream Cipher MAC |
| Security status |
🧪 Experimental |
| Complexity |
Intermediate |
| Inventor |
Bartosz Zoltak |
| Year |
2004 |
| Origin |
Not specified |
| Source |
algorithms/mac/vmpcmac.js |
Parameters
| Parameter |
Supported values |
| Key sizes |
1 byte (8 bits) to 768 bytes (6144 bits) |
| Nonce sizes |
1 byte (8 bits) to 768 bytes (6144 bits) |
| MAC sizes |
20 bytes (160 bits) |
Capabilities
Security
Status: 🧪 Experimental
Known vulnerabilities
| Issue |
Description |
Mitigation |
| Limited Cryptanalysis |
VMPC-MAC has received less cryptanalytic attention compared to established MACs |
Use only after thorough security review for your specific use case |
Documentation
References
Test vectors
1 vector ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — BouncyCastle Test Vector - MAC of bytes 0x00 to 0xFF
| Field |
Value |
key |
9661410ab797d8a9eb767c21172df6c7 |
iv |
4b5c2f003e67f39557a8d26f3da2b155 |
input |
000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f 404142434445464748494a4b4c4d4e4f 505152535455565758595a5b5c5d5e5f 606162636465666768696a6b6c6d6e6f 707172737475767778797a7b7c7d7e7f 808182838485868788898a8b8c8d8e8f 909192939495969798999a9b9c9d9e9f a0a1a2a3a4a5a6a7a8a9aaabacadaeaf b0b1b2b3b4b5b6b7b8b9babbbcbdbebf c0c1c2c3c4c5c6c7c8c9cacbcccdcecf d0d1d2d3d4d5d6d7d8d9dadbdcdddedf e0e1e2e3e4e5e6e7e8e9eaebecedeeef f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff |
expected |
9bda16e2ad0e284774a3acbc8835a8326c11faad |
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