# CRYPTO_CERTIFICATE_KEY_USAGE_CERTIFICATE_SIGN

`import { CRYPTO_CERTIFICATE_KEY_USAGE_CERTIFICATE_SIGN } from "destack:crypto/binding";`

Certificate key usage: certificate signing.

```ds title="CRYPTO_CERTIFICATE_KEY_USAGE_CERTIFICATE_SIGN"
const CRYPTO_CERTIFICATE_KEY_USAGE_CERTIFICATE_SIGN: CryptoCertificateKeyUsageFlags
```

[language/library/src/crypto/binding/certificate.ds:109](https://github.com/destack-sh/destack/blob/main/language/library/src/crypto/binding/certificate.ds#L109)