SHA-512/256 is a truncated variant of SHA-512 with a modified initialization vector, producing 256-bit hash values. Defined in FIPS 180-4 for applications requiring 256-bit security with SHA-512 performance characteristics.
| Property | Value |
|---|---|
| Category | Hash Functions |
| Sub-category | SHA-2 Family |
| Variant | 512/256 |
| Security status | 🛡️ Secure |
| Complexity | Intermediate |
| Inventor | NIST |
| Year | 2012 |
| Origin | 🇺🇸 United States |
| Source | algorithms/hash/sha512.js |
| Parameter | Supported values |
|---|---|
| Output sizes | 32 bytes (256 bits) |
Status: 🛡️ Secure
No vulnerabilities are recorded for this implementation.
4 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — FIPS 180-4 Test Vector - Empty String
| Field | Value |
|---|---|
input |
(empty) |
expected |
c672b8d1ef56ed28ab87c3622c5114069bdd3ad7b8f9737498d0c01ecef0967a |
Vector 2 — FIPS 180-4 Test Vector - Single ‘a’
| Field | Value |
|---|---|
input |
61 |
expected |
455e518824bc0601f9fb858ff5c37d417d67c2f8e0df2babe4808858aea830f8 |
Vector 3 — FIPS 180-4 Test Vector - ‘abc’
| Field | Value |
|---|---|
input |
616263 |
expected |
53048e2681941ef99b2e29b76b4c7dabe4c2d0c634fc6d46e0e2f13107e7af23 |
Vector 4 — FIPS 180-4 Test Vector - Long String
| Field | Value |
|---|---|
input |
61626364656667686263646566676869 636465666768696a6465666768696a6b 65666768696a6b6c666768696a6b6c6d 6768696a6b6c6d6e68696a6b6c6d6e6f 696a6b6c6d6e6f706a6b6c6d6e6f7071 6b6c6d6e6f7071726c6d6e6f70717273 6d6e6f70717273746e6f707172737475 |
expected |
3928e184fb8690f840da3988121d31be65cb9d3ef83ee6146feac861e19b563a |