ISO/IEC 27034 Lead Application Security Auditor study materials
ISO/IEC 27034 Lead Application Security Auditor study resources

ISO/IEC 27034 Lead Application Security Auditor key terms

ISO/IEC 27034 Lead Application Security Auditor · Get comfortable with the vocabulary.

Application Security Control (ASC)

A safeguard, measure, or countermeasure that reduces application security risk and is defined, measured, and verified as part of an application's security profile under ISO/IEC 27034.

Related: Application Security Control Library, Targeted Level of Trust
Application Security Control Library

A structured repository of reusable security controls, each with attributes such as verification method, assurance level, and applicable technology, from which an application's controls are selected and tailored.

Related: Application Security Control (ASC), Tailoring
Organizational Normative Framework (ONF)

The organization-wide set of security standards, policies, control libraries, and processes that provides the common foundation from which application-specific security frameworks are derived.

Related: Application Normative Framework (ANF), Application Security Control Library
Application Normative Framework (ANF)

The application-specific subset of the organizational normative framework, containing the selected and tailored controls and verification requirements that apply to one particular application.

Related: Organizational Normative Framework (ONF), Tailoring
Application Security Management Process (ASMP)

The defined, repeatable set of activities by which an organization plans, implements, verifies, and maintains application security across the application lifecycle, including roles, evidence, and decision points.

Related: Application Security Audit, Audit Criteria
Targeted Level of Trust (TLT)

The level of assurance an organization decides an application must achieve, balancing business risk, cost, and regulatory obligations, and which drives control selection and audit depth.

Related: Application Security Control (ASC), Risk-Based Audit Scope
Application Security Risk

The potential for loss or harm arising from threats exploiting weaknesses in an application, expressed as a combination of likelihood and business impact.

Related: Risk-Based Audit Scope, Threat Modeling
Threat Modeling

A structured method of identifying threats, attack paths, and trust boundaries for an application so that proportionate controls can be designed and later verified by audit.

Related: Application Security Risk, Application Security Control (ASC)
Security Assurance

The justified confidence, supported by objective evidence, that an application's security controls operate as intended and meet the targeted level of trust.

Related: Targeted Level of Trust (TLT), Audit Evidence
Tailoring

The documented process of adapting generic library controls to an application's specific technology, architecture, and risk context, recording justification for any additions, changes, or exclusions.

Related: Application Normative Framework (ANF), Application Security Control Library
Application Security Audit

An independent, systematic, and documented examination of an application's security controls and processes against defined criteria, producing conclusions and findings reported to interested parties.

Related: Audit Criteria, Audit Evidence
Audit Criteria

The set of requirements, standards, policies, and control objectives against which audit evidence is evaluated to determine conformity, drawn from the applicable normative framework.

Related: Application Normative Framework (ANF), Audit Evidence
Audit Scope

The documented boundary of an audit, identifying which applications, lifecycle phases, locations, technologies, and organizational units are included and excluded.

Related: Risk-Based Audit Scope, Audit Plan
Risk-Based Audit Scope

A scoping approach that allocates audit effort proportionally to the likelihood and impact of application security risk, prioritizing high-value and high-exposure systems.

Related: Audit Scope, Application Security Risk
Audit Plan

A document describing audit objectives, scope, criteria, schedule, sampling approach, team roles, and resource allocation for a specific audit engagement.

Related: Audit Scope, Audit Sampling
Audit Sampling

The selection of a subset of controls, transactions, code, or records for examination, chosen so results can reasonably support conclusions about the whole population.

Related: Audit Plan, Audit Evidence
Audit Evidence

Records, statements of fact, observations, and test results that are relevant, verifiable, and sufficient to support audit findings and conclusions.

Related: Audit Criteria, Security Assurance
Opening Meeting

A formal meeting at audit start confirming scope, criteria, schedule, methods, and communication channels with the auditee and agreeing practical arrangements.

Related: Closing Meeting, Audit Plan
Closing Meeting

A formal meeting at audit conclusion at which the audit team presents findings, conclusions, and any nonconformities, and agrees follow-up responsibilities and timeframes.

Related: Opening Meeting, Nonconformity
Conformity

Fulfilment of a specified requirement, demonstrated when audit evidence shows that a control or process meets the applicable audit criteria.

Related: Nonconformity, Audit Criteria
Nonconformity

A documented failure to fulfil a specified requirement, supported by objective evidence and classified by severity for reporting and corrective action purposes.

Related: Major Nonconformity, Corrective Action
Major Nonconformity

A nonconformity that significantly undermines the effectiveness of controls or the management system, or that represents a systemic failure requiring immediate and substantial correction.

Related: Minor Nonconformity, Nonconformity
Minor Nonconformity

An isolated or limited lapse that does not by itself invalidate the effectiveness of the control or management system but still requires documented correction.

Related: Major Nonconformity, Corrective Action
Observation

A statement of fact or improvement opportunity noted during an audit that does not constitute a nonconformity against the audit criteria but merits management attention.

Related: Nonconformity, Audit Finding
Audit Finding

The documented result of evaluating collected audit evidence against audit criteria, which may indicate conformity, nonconformity, or an opportunity for improvement.

Related: Audit Evidence, Observation
Corrective Action

Action taken to eliminate the cause of a detected nonconformity so that it does not recur, distinct from immediate containment or correction of the symptom.

Related: Root Cause Analysis, Correction
Correction

Immediate action to eliminate a detected nonconformity, such as patching a vulnerable component, without necessarily addressing the underlying cause.

Related: Corrective Action, Root Cause Analysis
Root Cause Analysis

A structured investigation to determine why a nonconformity occurred, examining process, technology, and human factors so that corrective action addresses the true origin.

Related: Corrective Action, Correction
Corrective Action Plan

A documented plan specifying actions, owners, resources, and target dates for resolving a nonconformity and preventing recurrence, subject to auditor verification.

Related: Corrective Action, Follow-Up Audit
Follow-Up Audit

A subsequent verification activity confirming that corrective actions were implemented and are effective, closing findings when evidence demonstrates sustained resolution.

Related: Corrective Action Plan, Audit Finding
Lead Auditor

The auditor responsible for managing the audit team, agreeing scope and criteria, directing evidence collection, and delivering the final audit report and conclusions.

Related: Audit Team Competence, Audit Report
Audit Team Competence

The combination of education, training, technical application security skills, audit experience, and personal attributes that enables team members to perform assigned audit tasks effectively.

Related: Lead Auditor, Technical Expert
Technical Expert

A person with specialized application security knowledge, such as secure code review or penetration testing, who advises the audit team without acting as an auditor.

Related: Audit Team Competence, Audit Evidence
Independence and Objectivity

The condition in which auditors are free from bias, conflict of interest, or undue influence, ensuring findings and conclusions are based solely on evidence against criteria.

Related: Lead Auditor, Audit Evidence
Audit Report

The formal record of an audit describing scope, criteria, methods, findings, conclusions, and any nonconformities, distributed to those entitled to receive it.

Related: Audit Finding, Lead Auditor
Confidentiality of Audit Records

The principle that audit evidence, reports, and working papers containing sensitive application details are protected, accessed only by authorized parties, and handled per legal and contractual obligations.

Related: Audit Report, Independence and Objectivity