PSAA study materials
PSAA study resources

PSAA key terms

PSAA · Get comfortable with the vocabulary.

Prompt injection

An attack where untrusted input, such as a web page or document, contains instructions that cause a large language model to ignore its original directives and act on the attacker's intent.

Related: Jailbreak, Indirect prompt injection, Guardrails
Indirect prompt injection

A prompt injection delivered through content the model retrieves or processes rather than through the user's own message, such as a poisoned document, email, or web page that carries hidden instructions.

Related: Prompt injection, Retrieval-augmented generation, Tool use
Jailbreak

A technique that bypasses a model's safety alignment so it produces content its policy forbids, typically by role-play framing, encoding tricks, or multi-turn persuasion rather than by injecting external content.

Related: Prompt injection, Guardrails, Model alignment
Guardrails

Controls placed around a model's input and output to enforce policy, such as content classifiers, schema validation, allow-lists for tools, and blocking of sensitive data patterns before a response is returned.

Related: Prompt injection, Output filtering, Human-in-the-loop approval
Retrieval-augmented generation

An architecture where a model is given relevant documents fetched from a search index at query time so answers are grounded in current or private data instead of only pretrained knowledge.

Related: Indirect prompt injection, Data poisoning, Vector database
Data poisoning

Tampering with training or retrieval data so a model learns wrong associations or surfaces attacker-chosen content, which can later trigger biased answers or malicious actions.

Related: Retrieval-augmented generation, Model supply chain, Vector database
Model supply chain risk

Exposure created by using third-party models, weights, plugins, or datasets whose provenance, licensing, and integrity are not fully verified, allowing hidden backdoors or unsafe behavior.

Related: Data poisoning, Model card, Software bill of materials
Tool use

A capability where a model calls external functions or APIs to act on the world, which expands its reach and makes authorization, input validation, and least privilege essential.

Related: Indirect prompt injection, Excessive agency, Human-in-the-loop approval
Excessive agency

A failure mode where an AI agent is granted permissions, tools, or autonomy beyond what its task requires, so a manipulated or mistaken decision can cause disproportionate harm.

Related: Tool use, Least privilege, Human-in-the-loop approval
Human-in-the-loop approval

A control requiring a person to review and authorize a high-impact action proposed by an automated system before it executes, limiting damage from errors or manipulation.

Related: Excessive agency, Guardrails, Tool use
Zero trust

A security model that treats no network location as inherently trusted and instead verifies identity and device posture for every request before granting access to a resource.

Related: Microsegmentation, SASE, Least privilege
Microsegmentation

Dividing a network into small zones with granular allow rules so workloads can reach only the specific peers they need, containing lateral movement after a compromise.

Related: Zero trust, Least privilege, East-west traffic
East-west traffic

Network flows between internal hosts or workloads inside a data center, as opposed to client-to-server north-south traffic, and a common path for lateral movement.

Related: Microsegmentation, Lateral movement
Lateral movement

The techniques an attacker uses after initial access to move from one compromised host to others, escalating privileges and expanding control across the environment.

Related: East-west traffic, Microsegmentation, Credential theft
Intrusion detection system

A sensor that inspects network or host activity against signatures or behavioral baselines and raises alerts on suspicious patterns, either passively or inline to block.

Related: East-west traffic, Security information and event management, False positive
SASE

Secure Access Service Edge converges network connectivity such as SD-WAN with cloud-delivered security services like secure web gateway, CASB, and zero trust network access in one policy-managed fabric.

Related: Zero trust network access, Secure web gateway, CASB
Zero trust network access

A service that grants users access to individual private applications after identity and device checks, without placing them on the broader corporate network.

Related: SASE, Zero trust, Identity provider
Secure web gateway

A proxy that inspects and filters outbound web traffic, enforcing acceptable-use policy, blocking malicious sites, and applying data controls such as TLS inspection and file scanning.

Related: SASE, TLS inspection, CASB
CASB

A cloud access security broker sits between users and cloud services to discover shadow IT, enforce usage policy, and apply data loss prevention and access controls to SaaS applications.

Related: SASE, Shadow IT, Data loss prevention
TLS inspection

A gateway technique that terminates and re-establishes encrypted sessions so traffic can be examined, requiring certificate trust on endpoints and careful handling of privacy and pinned applications.

Related: Secure web gateway, Data loss prevention
Shadow IT

Cloud services and applications adopted by employees without IT approval, creating unmanaged data stores and blind spots that discovery tools and policy enforcement aim to surface.

Related: CASB, Data loss prevention
Security information and event management

A platform that centralizes logs from many sources, correlates events against detection rules, and alerts analysts, forming the data backbone of a security operations center.

Related: SIEM ingestion, Detection rule, False positive
Detection rule

Logic that specifies which event patterns should raise an alert, expressed as signatures, correlation sequences, or behavioral thresholds, and tuned to balance coverage against noise.

Related: Security information and event management, False positive, MITRE ATT&CK
MITRE ATT&CK

A public knowledge base of adversary tactics and techniques observed in real intrusions, used to organize detections, plan threat hunting, and measure defensive coverage gaps.

Related: Detection rule, Threat hunting, Indicator of compromise
Threat hunting

Proactive, hypothesis-driven searching through telemetry for signs of compromise that existing alerts missed, rather than waiting for a detection to fire.

Related: MITRE ATT&CK, Indicator of compromise, Security information and event management
Indicator of compromise

An observable artifact such as a file hash, domain, or IP address associated with known malicious activity, useful for matching but easily changed by attackers.

Related: Threat hunting, MITRE ATT&CK
False positive

An alert raised on benign activity, which consumes analyst time and erodes trust in detection; tuning reduces these while preserving true detections.

Related: Detection rule, Security information and event management, Playbook
Playbook

A documented, repeatable sequence of steps an analyst or automation follows to triage and respond to a specific alert type, encoding decisions and escalation criteria.

Related: SOAR, False positive, Incident response
SOAR

Security orchestration, automation, and response tooling chains together systems and executes playbooks automatically, handling repetitive triage and enrichment tasks to speed response.

Related: Playbook, Incident response
Shared responsibility model

The division of security duties between a cloud provider and its customer, where the provider secures the underlying infrastructure and the customer secures data, identities, and configuration.

Related: Misconfiguration, Cloud security posture management, Identity provider
Misconfiguration

An insecure setting in a cloud or application service, such as a public storage bucket or overly broad role, that exposes data without requiring an exploit.

Related: Shared responsibility model, Cloud security posture management, Least privilege
Cloud security posture management

A tool that continuously scans cloud accounts against benchmarks and policy, flagging risky configurations and drift and often offering automated remediation.

Related: Misconfiguration, Shared responsibility model, Infrastructure as code scanning
Infrastructure as code scanning

Static analysis of declarative templates such as Terraform or Kubernetes manifests before deployment, catching insecure resource settings early in the pipeline rather than in production.

Related: Cloud security posture management, Misconfiguration
Observability

The ability to understand a system's internal state from its outputs, combining logs, metrics, and traces so teams can diagnose failures and spot anomalous behavior.

Related: Distributed tracing, Mean time to remediate, Log retention
Distributed tracing

Instrumentation that follows a single request across services using shared trace identifiers, revealing where latency or errors originate in a multi-service architecture.

Related: Observability, Log retention
Mean time to remediate

The average elapsed time from detecting an issue to fully fixing it, a key measure of response effectiveness that complements detection-focused metrics.

Related: Observability, Playbook, Incident response
Log retention

The policy defining how long telemetry is stored and at what fidelity, balancing investigation and compliance needs against cost and privacy obligations.

Related: Observability, Security information and event management
Identity provider

A service that authenticates users and issues assertions or tokens about their identity to relying applications, centralizing credential checks and enabling single sign-on.

Related: SSO, MFA, Conditional access
SSO

Single sign-on lets a user authenticate once with a central identity provider and reach many applications without separate credentials, reducing password sprawl and phishing surface.

Related: Identity provider, MFA, Conditional access
MFA

Multi-factor authentication requires two or more independent evidence types, such as a password plus a hardware key or push approval, making stolen passwords far less useful.

Related: Identity provider, Phishing-resistant authentication, MFA fatigue
Phishing-resistant authentication

Credential methods bound to the legitimate service origin, such as passkeys or FIDO hardware keys, which cannot be replayed against a lookalike site by an attacker.

Related: MFA, MFA fatigue
MFA fatigue

An attack that bombards a user with push notifications until they approve one, or that pairs a stolen password with a single well-timed prompt to gain access.

Related: MFA, Phishing-resistant authentication
Conditional access

Policy that grants or blocks access based on context such as user role, device compliance, location, and risk level, evaluated at each sign-in and session.

Related: Identity provider, Zero trust, Least privilege
Least privilege

Granting only the permissions needed for a task and only for as long as needed, limiting the blast radius if an account or workload is compromised.

Related: Conditional access, Excessive agency, Microsegmentation