Simple 8-bit summation checksum. Adds all bytes and keeps only the lowest 8 bits (modulo 256). Fast and lightweight, commonly used in embedded systems.
| Property | Value |
|---|---|
| Category | Checksums |
| Sub-category | Summation |
| Security status | 🎓 Educational Only |
| Complexity | Beginner |
| Inventor | Unknown (fundamental technique) |
| Year | 1950 |
| Origin | Not specified |
| Source | algorithms/checksum/sum-checksum.js |
Status: 🎓 Educational Only
No vulnerabilities are recorded for this implementation.
2 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — Simple sequence
Source: Sum8 calculation
| Field | Value |
|---|---|
input |
01020304 |
expected |
0a |
Vector 2 — Overflow test
Source: Sum8 with overflow
| Field | Value |
|---|---|
input |
ffff |
expected |
fe |