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## cosign initialize
Initializes SigStore root to retrieve trusted certificate and key targets for verification.
### Synopsis
Initializes SigStore root to retrieve trusted certificate and key targets for verification.
The following options are used by default:
- The current trusted Sigstore TUF root is embedded inside cosign at the time of release.
- SigStore remote TUF repository is pulled from the CDN mirror at tuf-repo-cdn.sigstore.dev.
To provide an out-of-band trusted initial root.json, use the -root flag with a file or URL reference.
This will enable you to point cosign to a separate TUF root.
Any updated TUF repository will be written to $HOME/.sigstore/root/.
Trusted keys and certificate used in cosign verification (e.g. verifying Fulcio issued certificates
with Fulcio root CA) are pulled form the trusted metadata.
```
cosign initialize [flags]
```
### Examples
```
cosign initialize --mirror <url> --out <file>
# initialize root with distributed root keys, default mirror, and default out path.
cosign initialize
# initialize with an out-of-band root key file, using the default mirror.
cosign initialize --root <url>
# initialize with an out-of-band root key file and custom repository mirror.
cosign initialize --mirror <url> --root <url>
# initialize with an out-of-band root key file and custom repository mirror while verifying root checksum.
cosign initialize --mirror <url> --root <url> --root-checksum <sha256>
```
### Options
```
-h, --help help for initialize
--mirror string GCS bucket to a SigStore TUF repository, or HTTP(S) base URL, or file:/// for local filestore remote (air-gap) (default "https://tuf-repo-cdn.sigstore.dev")
--root string path to trusted initial root. defaults to embedded root
--root-checksum string checksum of the initial root, required if root is downloaded via http(s). expects sha256 by default, can be changed to sha512 by providing sha512:<checksum>
```
### Options inherited from parent commands
```
--output-file string log output to a file
-t, --timeout duration timeout for commands (default 3m0s)
-d, --verbose log debug output
```
### SEE ALSO
* [cosign](cosign.md) - A tool for Container Signing, Verification and Storage in an OCI registry.
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