---
oid: "1.3.6.1.4.1.22554.1.1"
asn1-notation: "{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 22554 pbe(1) sha1(1)}"
description: "Secure Hash Algorithm version 1 (SHA1)"
last-modified: "2026-01-28"
tags: [oid-repository]
---

## OID: `1.3.6.1.4.1.22554.1.1`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 22554 pbe(1) sha1(1)}
```

### Description

Secure Hash Algorithm version 1 (SHA1)

**Classification**: Algorithm

### Child OIDs

- [OID `1.3.6.1.4.1.22554.1.1.2`](https://oid-base.com/get-md/1.3.6.1.4.1.22554.1.1.2): `pkcs12(2)`

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