---
type: concept
title: RSA Keys
tags: [cryptography, pki, rsa]
related: [ec-keys, serverzertifikate, openssl]
created: 2026-06-30
updated: 2026-06-30
sources: ["output/rz_uni_greifswald_de_dienste_allgemein_dfn_pki_zertifikate_serverzertifikate_ope.md"]
---

# RSA Keys

**RSA Keys** are a classic public-key cryptography standard. While newer standards like EC keys are often preferred, RSA remains necessary for specific legacy or functional requirements.

## Usage at Universität Greifswald
For server certificates at the university, a key length of **4096-bit** is recommended when using RSA.

## Necessity for Key Encipherment
RSA keys must be used instead of EC keys when the certificate requires **Key Encipherment**. A primary example of this requirement is the [[shibboleth]] authentication system.
