Enhanced DEFLATE (ZIP compression method 9) with a 64KB sliding window, distance codes up to 65536, and a 16-bit extended length code reaching matches up to 65538 bytes. Always uses dynamic Huffman blocks - no fixed table is defined for the extended alphabet.
| Property | Value |
|---|---|
| Category | Compression Algorithms |
| Sub-category | Hybrid |
| Security status | Not classified |
| Complexity | Advanced |
| Inventor | PKWARE |
| Year | 2001 |
| Origin | 🇺🇸 United States |
| Source | algorithms/compression/deflate64.js |
Status: not classified — treat as unverified.
No vulnerabilities are recorded for this implementation.
3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — Deflate64 round-trip - hello
| Field | Value |
|---|---|
input |
68656c6c6f |
expected |
(empty) |
Vector 2 — Deflate64 round-trip - AAAA
| Field | Value |
|---|---|
input |
41414141 |
expected |
(empty) |
Vector 3 — Deflate64 round-trip - ABCABCABC
| Field | Value |
|---|---|
input |
414243414243414243 |
expected |
(empty) |