# Install sha1dc

Tool to detect SHA-1 collisions in files, including SHAttered. Version 1.0.3 via Homebrew; verified from local package data.

## Install

```sh
sudo av install brew:sha1dc
```

Additional install commands:

### macOS

- Homebrew (100%):

```sh
brew install sha1dc
```

  Evidence: local Homebrew formula metadata

## Package Facts

- **Package key:** brew:sha1dc
- **Package manager:** Homebrew
- **Package manager URL:** <https://formulae.brew.sh/formula/sha1dc>
- **Version:** 1.0.3
- **Source summary:** Tool to detect SHA-1 collisions in files, including SHAttered
- **Homepage:** <https://github.com/cr-marcstevens/sha1collisiondetection>
- **Repository:** <https://github.com/cr-marcstevens/sha1collisiondetection>
- **Upstream docs:** <https://github.com/cr-marcstevens/sha1collisiondetection#readme>
- **License:** MIT
- **Source archive:** <https://github.com/cr-marcstevens/sha1collisiondetection/archive/refs/tags/stable-v1.0.3.tar.gz>
- **Generated:** 2026-06-10T07:18:26+00:00

## Executables

- sha1dcsum (cli)
- sha1dcsum_partialcoll (cli)
- sha1dcsum (alias)
- sha1dcsum_partialcoll (alias)

## Build Dependencies

- coreutils
- libtool

## Install Behavior

- Post-install hook: not defined
- Bottle: available on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura

## Freshness

- Page generated: 2026-06-10
- Package-manager version: 1.0.3
- Local data status: ok
- Upstream repository: https://github.com/cr-marcstevens/sha1collisiondetection
- info: No package-manager update timestamp was available.
- info: No cached GitHub release or tag data was available.

## Sicherheitshinweise

narrow executable package without higher-risk signals.

- **Geiger risk:** green / low
- narrow executable package without higher-risk signals

## Source Database Details

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** sha1dc
- **Version Scheme:** 0
- **Revision:** 0
- **Head Version:** HEAD
- **Bottle Stable Root URL:** <https://ghcr.io/v2/homebrew/core>
- **Deprecated:** no
- **Disabled:** no
- **Keg Only:** no
- **URL Keys:** head, stable


## Related Links

- [Source-control packages](https://www.automicvault.com/de/pkg/source-control-tools/) - Belongs to a source-control command family.
- [Terminal utility packages](https://www.automicvault.com/de/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Networking and protocol packages](https://www.automicvault.com/de/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata.
- [Security and crypto packages](https://www.automicvault.com/de/pkg/security-crypto-tools/) - Matched security, identity, cryptography, password, signing, or certificate metadata.
- [coreutils](https://www.automicvault.com/de/pkg/brew/coreutils/) - Build dependency declared by Homebrew.
- [libtool](https://www.automicvault.com/de/pkg/brew/libtool/) - Build dependency declared by Homebrew.
- [sha3sum](https://www.automicvault.com/de/pkg/brew/sha3sum/) - Shares av.db curated category or tags: cli, cryptography, hash-utilities, hashing, security.
- [sha2](https://www.automicvault.com/de/pkg/brew/sha2/) - Shares av.db curated category or tags: cli, cryptography, hash-utilities, hashing, security.
- [nettle](https://www.automicvault.com/de/pkg/brew/nettle/) - Shares av.db curated category or tags: cli, cryptography, hashing, security.
- [md5sha1sum](https://www.automicvault.com/de/pkg/brew/md5sha1sum/) - Shares av.db curated category or tags: cli, cryptography, hashing, security, sha1.
- [gnutls](https://www.automicvault.com/de/pkg/brew/gnutls/) - Shares av.db curated category or tags: cli, cryptography, security.
- [nss](https://www.automicvault.com/de/pkg/brew/nss/) - Shares av.db curated category or tags: cli, cryptography, security.
- [gpgme](https://www.automicvault.com/de/pkg/brew/gpgme/) - Shares av.db curated category or tags: cli, cryptography, security.
- [mbedtls](https://www.automicvault.com/de/pkg/brew/mbedtls/) - Shares av.db curated category or tags: cli, cryptography, security.
- [md5deep](https://www.automicvault.com/de/pkg/brew/md5deep/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, cryptography, files, hashing, security.
- [age](https://www.automicvault.com/de/pkg/brew/age/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, cryptography, files, security.
- [age-plugin-yubikey](https://www.automicvault.com/de/pkg/brew/age-plugin-yubikey/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, cryptography, files, security.

## Sources

- Nucleus package database
- Geiger risk classifier
- package-page enrichment
- package version freshness
- av.db category and tag curation
- package relationship graph
- cross-ecosystem install command graph