Contents

# 디지털 서명 적용

## 인증서 얻기

You can get a certificate from a certification authority. No matter if you choose a governmental institution or a private company it is common to be charged for this service, for example when they certify your identity. Few other authorities issue certificates free of costs, like the Open Source Project CAcert which is based on the well-known and reliable Web of Trust model and is of growing popularity.

## 인증서 관리

If you are using Linux, macOS or Solaris, you must install a recent version of Thunderbird or Firefox. LibreOffice will then access their certificate storage.

If you have created different profiles in Thunderbird or Firefox and you want to use certificates from one specific user profile, select the profile in LibreOffice - Preferences Tools - Options - Security - Certificate Path. Alternatively, you can set the environment variable MOZILLA_CERTIFICATE_FOLDER to point to the folder containing that profile.

1. Open your web browser’s preferences, select the Advanced section, click on the Certificates tab, and then choose View Certificates. The Certificate Manager dialog will appear.

2. 새 루트 인증서를 가져온 다음 해당 인증서를 선택하여 편집합니다. 루트 인증서를 최소한 웹 및 전자 메일 액세스에 대해 트러스트 되도록 활성화합니다. 이렇게 하면 해당 인증서로 사용자의 문서에 서명할 수 있습니다. 같은 방식으로 중간 인증서를 편집할 수 있지만 이 작업은 문서 서명에 반드시 필요한 것은 아닙니다.

3. 새 인증서를 편집하고 나면 LibreOffice을(를) 다시 시작합니다.

On Windows systems, LibreOffice will access the system certificate storage.

Your private key for the digital signature will usually be generated and securely stored by Windows as part of the signature-issuance process. Once the issuing Certificate Authority is satisfied that your computer produced the private key and you have satisfied any other identification requirements, the corresponding public key is signed by the Certificate Authority. For personal keys obtained over the Internet, the private key is generated by your browser and it is not shared with the Certificate Authority.

If a private key is received by other means or you transfer it from another computer, you can install it on your Windows PC by double-clicking on the private key certificate and providing any required password. This private key may be known to others (such as an organizational or governmental security administration) depending on how it was issued to you.

Public keys of other people used to verify document digital signatures, or encrypt documents for their eyes only, are usually stored in your system with digital certificate-management applications. In some cases you will need to manage those public-key certificates yourself.

The general management of public and private keys on your PC will vary depending on the version of Windows you are operating. For more information, use the "Help and Support" topic of your Windows version and search for "digital signature".

## 문서 서명

1. Choose File - Digital Signatures - Digital Signatures.

2. 문서를 저장하라는 내용의 메시지 상자가 나타납니다. 예를 클릭하여 파일을 저장합니다.

3. After saving, you see the Digital Signatures dialog. Click Add to add a public key to the document.

4. In the Select Certificate dialog, select your certificate and click OK.

5. You see again the Digital Signatures dialog, where you can add more certificates if you want. Click OK to add the public key to the saved file.

A signed document shows an icon in the status bar. You can double-click the icon in the status bar to view the certificate.

The result of the signature validation is displayed in the status bar and within the Digital Signature dialog. Several documents and macro signatures can exist inside an ODF document. If there is a problem with one signature, then the validation result of that one signature is assumed for all signatures. That is, if there are ten valid signatures and one invalid signature, then the status bar and the status field in the dialog will flag the signature as invalid.

## 문서 내의 매크로에 서명

일반적으로 매크로는 문서의 일부입니다. 문서에 서명하면 문서 내의 매크로에도 자동으로 서명됩니다. 문서에는 서명하지 않고 매크로에만 서명하려면 다음과 같이 실행하십시오.

1. 도구 - 매크로 - 디지털 서명을 선택합니다.

2. 위에서 설명한 대로 문서에 서명을 적용합니다.

When you open the Basic IDE that contains signed macros, you see an icon in the status bar.
You can double-click the icon in the status bar to view the certificate.

관련 주제

English Wiki page on digital signatures

전자 서명에 대하여

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