보호 유형을 파악하고,
올바른 복구 방법을 선택하세요.
직접 수행한 테스트, 다운로드 가능한 샘플, 명확한 한계로 PDF·Excel·ZIP 비밀번호 문제를 설명합니다.
OPEN PASSWORD / SHEET / STRUCTURE
SAME EXTENSION. DIFFERENT REVISIONS.
FORMAT / TOOL LIMIT / VALIDATION
확장자는 단서일 뿐 진단이 아닙니다.
파일이 어떤 작업을 제한하는지 먼저 확인하세요.
Workbook package parts unchanged in our worksheet-unprotect test.
See exactly what changed ↗실험실
연구 기사 전문은 현재 영어로 제공됩니다.
Excel password remover online: first identify what is actually locked
Five downloadable Excel test files show the difference between an opening password, worksheet protection and workbook structure protection. Includes a private, browser-only XLSX inspector.
실험 읽기 ↗EXPERIMENT / 02 · Excel integrityHow to unprotect an Excel sheet: what changed in our integrity test?
A worksheet-unprotect test with formulas, formatting, a chart, merged cells and validation. See the two changed XML parts, twelve unchanged parts and the limits of the check.
실험 읽기 ↗EXPERIMENT / 03 · PDF benchmarkPDF password recovery time: R3, R4, R5 and R6 tested on one RTX 4060
Known-password controls and short numeric-mask tests on generated PDF files. Compare measured candidate rates, the failed R2 control and a clearly labeled time estimator.
실험 읽기 ↗EXPERIMENT / 04 · ZIP positive controlsLong ZIP password recovery: when a correct dictionary still reports no result
Five owned ZipCrypto samples with 31, 32, 51, 52 and 127-character known passwords expose a version-specific tool limit. Includes downloads, controls and a false-positive check.
실험 읽기 ↗Show the work.
01 / RepeatablePublic fixtures, known test passwords and SHA-256 fingerprints.
02 / SpecificVersions, protection types and measured conditions accompany results.
03 / HonestFailed controls and untested cases stay visible. No invented success rates.