# Technical Security Baseline

| Document information | Value |
|-----------------------|------|
| Document type | Requirements document (baseline) |
| Scope | {{ISMS_SCOPE}} |
| Organisation | {{ORG_NAME}} |
| Responsible | {{ROLE_IT_LEAD}} |
| Approved by | {{ROLE_ISB}} |
| Version | {{DOC_VERSION}} |
| Date | {{DOC_DATE}} |
| Status | {{DOC_STATUS}} |

## Purpose

This document defines the **concrete technical minimum parameters** of information security. It is the central point of maintenance for all measurable values (password lengths, deadlines, procedures). For exact values, the policies R01–R14 refer to the **baseline IDs** assigned here (e.g. `BL-IAM-01`) and repeat the key statement concretely in the respective implementation text.

Changes to parameters are made exclusively here and are approved by {{ROLE_ISB}}. The values are stored as adjustable defaults (variables); they correspond to the state of the art (guided, among others, by BSI IT-Grundschutz and current NIST recommendations).

## 1. Identity and access management

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-IAM-01 | Password requirements | Minimum length {{PW_MIN_LENGTH}} characters; {{PW_COMPLEXITY}}; check against known/compromised passwords; {{PW_ROTATION}} |
| BL-IAM-02 | Multi-factor authentication (MFA) | Mandatory for {{MFA_SCOPE}} |
| BL-IAM-03 | Session management | Automatic lock upon inactivity: {{SESSION_TIMEOUT}} |
| BL-IAM-04 | Account lockout | {{ACCOUNT_LOCKOUT}} |
| BL-IAM-05 | Recertification of authorisations | {{RECERT_FREQ}}; privileged rights additionally on an ad-hoc basis |
| BL-IAM-06 | Privileged/technical accounts | Separate management, individual assignment, enhanced logging; management via the central directory ({{TOOL_IAM}}) |
| BL-IAM-07 | IAM documentation location | Requests/approvals/blockings in {{TOOL_TICKET}}; account management in the central directory ({{TOOL_IAM}}) |

## 2. Cryptography and transmission

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-CRY-01 | Transport encryption | At least {{TLS_MIN}}; insecure protocols deactivated |
| BL-CRY-02 | Permissible algorithms/key lengths | {{CRYPTO_ALGO}} |
| BL-CRY-03 | Data media encryption | Full encryption of mobile devices and data media (AES-256) |
| BL-CRY-04 | Email/file exchange | Encryption of content requiring protection; secure exchange paths prescribed |
| BL-CRY-05 | Key management | Defined lifecycle (generation, distribution, storage, revocation, destruction){{#if FLAG_CRYPTO_PKI}}; PKI/certificate management established{{/if}} |

## 3. Operational security

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-OPS-01 | Patch SLA | Critical: {{PATCH_SLA_CRIT}}; high: {{PATCH_SLA_HIGH}}; standard: {{PATCH_SLA_STD}} |
| BL-OPS-02 | Vulnerability scanning | {{VULN_SCAN_FREQ}}; tracking in {{TOOL_TICKET}} |
| BL-OPS-03 | Malware protection | {{TECH_MALWARE}} on all endpoints/servers; signature/engine update {{MALWARE_UPDATE}} |
| BL-OPS-04 | Logging & retention | Central logging ({{TECH_SIEM}}); retention {{LOG_RETENTION}}; tamper-protected |
| BL-OPS-05 | Data backup | Scheme {{BACKUP_SCHEME}} via {{TECH_BACKUP}}; retention {{BACKUP_RETENTION}} |
| BL-OPS-06 | Recovery tests | {{BACKUP_TEST_FREQ}}; result documented |
| BL-OPS-07 | System hardening | Hardening requirements (e.g. CIS benchmarks) for standard systems |
| BL-OPS-08 | Technical review / penetration test | {{PENTEST_FREQ}} or risk-oriented |
| BL-OPS-09 | Change management | Request/assessment/test/approval/documentation in {{TOOL_TICKET}} |
{{#if FLAG_FW_ISO27001}}
| BL-OPS-10 | Time synchronisation | System clocks of all logging systems synchronised to {{NTP_SOURCES}}; deviations are monitored |
| BL-OPS-11 | Capacity management | Utilisation (compute, memory, bandwidth, licences) monitored {{CAPACITY_REVIEW_FREQ}}; thresholds raise an alert |
| BL-OPS-12 | Protection against data leakage | Measures against unauthorised outflow of protected information for {{DLP_SCOPE}} |
{{/if}}

## 4. Network security

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-NET-01 | Segmentation | Separation according to protection need; {{#if FLAG_OT_USED}}production/OT networks separated and specially secured; {{/if}}guest/external networks isolated |
| BL-NET-02 | Perimeter & remote access | Firewall with default deny; remote access only via {{TECH_VPN}} with MFA (BL-IAM-02) |
{{#if FLAG_FW_ISO27001}}
| BL-NET-03 | Web filtering | Access to external web content filtered (categories, known malicious sites); exceptions documented and time-limited |
{{/if}}

## 5. Endpoint and mobile use

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-EP-01 | Device management | Management via {{TECH_MDM}}; only approved devices |
| BL-EP-02 | Device encryption/remote wipe | Full encryption (BL-CRY-03); blocking/wiping upon loss via {{TECH_MDM}} |
| BL-EP-03 | Removable media | Only encrypted and approved; use controlled |

## 6. Physical security

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-PHY-01 | Security zones | Defined zones; access on a needs-oriented basis, documented, revoked when no longer needed |
| BL-PHY-02 | Access logging | Logging for areas requiring protection; visitors registered and escorted |
{{#if FLAG_FW_ISO27001}}
| BL-PHY-03 | Environmental protection and utilities | Early fire detection, protection against water, temperature/humidity monitoring in technical rooms; uninterruptible power for critical systems, tested regularly |
| BL-PHY-04 | Clear desk and screen lock | Protected documents and media locked away when unattended; automatic screen lock after {{SESSION_TIMEOUT}} |
{{/if}}

## 7. Personnel and suppliers

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-HR-01 | Awareness/training | Upon joining and thereafter at least {{REVIEW_CYCLE}}; evidence in {{TOOL_NAME}} |
| BL-SUP-01 | Supplier risk classes | Classification according to protection need and access; verification of compliance (evidence/TISAX) |
| BL-DEL-01 | Secure deletion | Deletion/destruction appropriate to the protection need (e.g. according to recognised standards); deletion evidence |

## 8. Governance and projects

| ID | Parameter | Requirement |
|----|-----------|---------|
| BL-GOV-01 | Audit/review cycle | Internal review {{REVIEW_CYCLE}}; independent review/assessment at least every 3 years or after fundamental changes |
| BL-PROJ-01 | Project classification criteria | Documented catalogue of criteria for the IS classification of projects (triggers/thresholds for ISO involvement) |
{{#if FLAG_FW_ISO27001}}
| BL-GOV-02 | Management review | Top management reviews the ISMS {{MGMT_REVIEW_CYCLE}} against a fixed agenda; decisions with owner and due date |
| BL-GOV-03 | Document control | Review cycle of the policy and thematic policies {{POLICY_REVIEW_CYCLE}}; four-eyes approval; retention of superseded versions {{RECORDS_RETENTION}} |
{{/if}}

## Change history

| Version | Date | Author | Change |
|---------|-------|-------|----------|
| {{DOC_VERSION}} | {{DOC_DATE}} | {{ROLE_IT_LEAD}} | Creation |