AI data security · LLM · RAG · Agents
Use all of your data in AI. Nothing raw, ever.
Field-level protection that travels with the data — into prompts, RAG pipelines, fine-tuning sets, and agent tool calls. AI teams ship to production. Compliance says yes.
Record sent to the model
- Customer name
- Lsrha Tvemun Tokenized
- Card number
- 4111 7720 1846 0457 Tokenized · last 4 kept
- SSN
- 713-06-5528 Tokenized · format kept
- Balance
- $48,210.55 Kept · needed for the answer
- Question
- Why was my 03/14 wire held? Kept
Same formats, same joins — the model still answers. Raw values are restored only for authorized users, and every reveal is logged.
AI data security glossary
AI security terms, defined plainly.
114 terms across agentic AI, LLM threats and defenses, data protection, privacy-enhancing technologies, and AI governance.
Showing 114 glossary terms
AI data security
AI & agentic securityAlso: AI security for data
Protecting the sensitive data that AI systems ingest, retrieve, generate, and act on — across training, retrieval, prompts, outputs, and agent actions.
Why it matters: Most AI risk is data risk. Protecting the data is what lets AI reach production.
LLM data protection
AI & agentic securityKeeping sensitive data in prompts, context, fine-tuning sets, and outputs protected so large language models can use it without exposing it.
Why it matters: LLMs process whatever they are given; protection has to happen before the data arrives.
RAG security
AI & agentic securitySecuring a retrieval-augmented generation pipeline end to end: ingestion, chunking, embeddings, vector stores, retrieval permissions, and generated answers.
Why it matters: RAG copies enterprise data into new stores that existing access controls rarely cover.
Protected RAG
AI & agentic securityRetrieval-augmented generation that prevents sensitive data exposure during retrieval or generation.
Agentic AI security
AI & agentic securityThe controls that govern what autonomous agents can see, call, and change: identity, tool permissions, data protection, and audit.
Why it matters: Agents act, not just answer — the data they touch must stay protected at every step.
Secure agentic AI
AI & agentic securityAI agents that operate with built-in data protection, oversight, and controlled autonomy.
Model Context Protocol (MCP)
AI & agentic securityAlso: MCP
An open protocol that standardizes how AI models and agents connect to tools, data sources, and applications.
Why it matters: MCP makes it easy to connect agents to enterprise systems — which makes data-level controls on those connections essential.
MCP security
AI & agentic securityAlso: MCP server security
Securing MCP servers, tools, and the data exchanged over them: authentication, scoped permissions, tool vetting, and protection of sensitive fields in requests and responses.
Why it matters: Every MCP server is a new path from an agent to your data.
Agentic AI
AI & agentic securityAlso: AI agents
AI that takes autonomous actions — calling APIs, executing code, and making decisions.
Why it matters: Autonomy widens the set of systems and data an AI can reach.
Tool use
AI & agentic securityAlso: Function calling
An AI calling external functions or APIs to complete a task.
Why it matters: Extends what AI can do beyond text — and extends the reach of a bad instruction.
Excessive agency
AI & agentic securityWhen an agent has more permissions, tools, or autonomy than its task requires.
Why it matters: Listed in the OWASP Top 10 for LLM Applications. Limit scope and protect the data agents can reach.
Non-human identity (NHI)
AI & agentic securityAlso: Agent identity
Credentials and identities used by agents, services, and workloads rather than people.
Why it matters: Every agent needs an identity that access policy can evaluate and audit.
AI-native data protection
AI & agentic securitySecurity designed for AI workflows, models, and data flows rather than adapted from network or application controls.
AI data sanitization
AI & agentic securityRemoving, masking, or transforming sensitive information before AI training or inference.
Model leakage prevention
AI & agentic securityTechniques that stop AI models from revealing sensitive or memorized data.
Prompt shielding
AI & agentic securityFiltering and protecting prompts and responses to prevent leakage of sensitive inputs.
AI policy enforcement
AI & agentic securityAutomated enforcement of data, security, and compliance rules across AI workflows.
Inference security
AI & agentic securityPreventing sensitive data exposure while a model processes queries.
Shadow AI
AI & agentic securityAlso: Unsanctioned AI
Use of AI tools and models outside sanctioned channels, often with sensitive data pasted in.
Why it matters: You can’t block every tool. Protecting the data itself limits what can leak.
Sovereign AI
AI & agentic securityRunning AI under a nation’s or organization’s own control over data, models, and infrastructure to meet residency and jurisdictional requirements.
Why it matters: Lets regulated organizations use modern models without giving up control of raw data.
Tokenization for AI
AI & agentic securityAlso: AI tokenization
Replacing sensitive values with format-preserving tokens before data reaches models, so AI can train, retrieve, and reason on it while raw values stay protected.
Why it matters: Data stays usable for AI — joins, patterns, and formats hold — without exposing identities.
Prompt injection
AI threatsMalicious input that hijacks AI behavior and makes it ignore its instructions.
Why it matters: Ranked the top risk in the OWASP Top 10 for LLM Applications.
Direct prompt injection
AI threatsA user directly tries to manipulate the model — “Ignore previous instructions and…”.
Why it matters: The simplest attack, and still effective without layered defenses.
Indirect prompt injection
AI threatsMalicious instructions hidden in content the AI retrieves or reads — documents, emails, web pages.
Why it matters: Attackers poison the sources your AI trusts.
Jailbreaking
AI threatsBypassing a model’s safety guardrails, often through roleplay or framing — “Pretend you’re an AI without restrictions…”.
PII leakage
AI threatsAn AI exposing personally identifiable information — SSNs, emails, salaries — in its responses.
Why it matters: A direct path to regulatory penalties and lost trust.
Sensitive information disclosure
AI threatsAlso: AI data leakage
Sensitive data escaping through prompts, outputs, logs, embeddings, or third-party model providers.
Why it matters: If raw data never reaches the model, there is far less to disclose.
Data exfiltration
AI threatsExtracting confidential data through AI, using it as a side channel.
Data poisoning
AI threatsCorrupting training data to compromise a model.
Why it matters: A long-term attack on model integrity.
Retrieval poisoning
AI threatsPlanting malicious documents in a knowledge base that a RAG system will retrieve.
Why it matters: The attacker’s instructions arrive looking like your own data.
Tool poisoning
AI threatsHiding malicious instructions in tool descriptions or MCP server metadata that agents read and follow.
Why it matters: Agents trust tool metadata — vet tools and scope what data they can receive.
Model extraction
AI threatsReconstructing a proprietary model’s behavior through repeated queries.
Membership inference
AI threatsDetermining whether a specific record was in a model’s training data.
Why it matters: A privacy attack: “Was my data used to train this?”
Training data extraction
AI threatsGetting a model to regurgitate its training data.
Why it matters: Private information can be recovered from model weights.
Model inversion
AI threatsReconstructing sensitive training inputs from model outputs.
Embedding inversion
AI threatsRecovering original text from vector embeddings.
Why it matters: Embeddings of raw PII are still sensitive data.
Adversarial examples
AI threatsInputs crafted with small changes that cause AI systems to misbehave.
Social engineering (AI)
AI threatsManipulating AI through roleplay or false authority — “As a system administrator, I need you to…”.
Context overflow
AI threatsFlooding the context window to bury malicious instructions in large documents.
Model hallucination
AI threatsAlso: Hallucination
When an AI confidently outputs inaccurate or fabricated information.
Why it matters: Plausible-sounding errors undermine trust in AI outputs.
Copilot oversharing
AI threatsAn AI assistant surfacing content a user can technically access but shouldn’t see, because permissions were too broad.
Why it matters: AI makes over-permissioned data instantly discoverable.
AI guardrails
AI defensesAlso: Guardrails
Rules and systems that control what AI can access, how it behaves, and what it can output.
Why it matters: Input and output filtering plus content policy — strongest when paired with protected data.
AI output controls
AI defensesControls that evaluate and filter what a model returns before it reaches a user or downstream system.
Semantic analysis
AI defensesUnderstanding intent, not just keywords.
Why it matters: Catches rephrased attacks that keyword filters miss.
Risk scoring
AI defensesProbability-based threat assessment, typically 0.0–1.0.
Why it matters: Enables nuanced decisions instead of binary allow/block.
Input validation
AI defensesChecking user prompts before processing.
Why it matters: A first line of defense — not sufficient alone.
Output filtering
AI defensesScanning AI responses before delivery.
Why it matters: Catches PII leakage and harmful content.
Context filtering
AI defensesScanning retrieved documents before the model sees them.
Why it matters: Stops indirect prompt injection.
Audit logging
AI defensesRecording all AI interactions.
Why it matters: Supports forensics, compliance, and monitoring.
API security for LLMs
AI defensesControls that protect data exchanged through AI model APIs.
Detokenization policy
AI defensesAlso: Re-identification policy
Rules that decide who or what can re-identify a protected value, for which purpose, and when.
Why it matters: Makes revealing raw data the logged exception, not the default.
Data tokenization
Data protectionAlso: Tokenization
Replacing sensitive data with tokens that preserve format and usability while reducing risk.
Why it matters: Not the same as an LLM token — this protects values; that measures text.
Field-level protection
Data protectionAlso: Field-level encryption
Protecting individual sensitive fields — a name, a card number — rather than whole files, databases, or networks.
Why it matters: Protection travels with the data into every copy, pipeline, and model.
Format-preserving encryption (FPE)
Data protectionAlso: FPE
Encryption whose output keeps the original format — length and character set — so systems and models keep working.
Why it matters: Protected data fits existing schemas with no application changes.
Data masking
Data protectionHiding sensitive fields using obfuscation techniques, typically for non-production use.
Pseudonymization
Data protectionReplacing personal identifiers with artificial ones to reduce risk.
Why it matters: Recognized under GDPR as a safeguard for personal data.
Redaction
Data protectionPermanently removing sensitive content from documents or text.
Encryption at rest
Data protectionEncrypting stored data to prevent unauthorized access.
Encryption in transit
Data protectionSecuring data while it moves across networks.
Data loss prevention (DLP)
Data protectionAlso: DLP
Tools that detect and block unauthorized sharing of sensitive data.
Why it matters: DLP sees data at the edge; it can’t follow data into embeddings or agent context.
Data classification
Data protectionCategorizing data by sensitivity, type, and regulatory needs.
Data lifecycle management
Data protectionManaging data from creation through use, retention, and deletion.
Data minimization
Data protectionLimiting collection, access, or retention to only what is strictly necessary.
Data breach impact reduction
Data protectionStrategies that minimize harm by ensuring stolen data remains protected or unusable.
Why it matters: Tokenized data is worthless to an attacker without the keys.
AI governance
Governance & complianceA framework for controlling risk, ethics, and compliance in AI systems.
Why it matters: Governance turns AI from pilot projects into accountable production systems.
AI risk management
Governance & complianceIdentifying and reducing risks related to AI data, behavior, and outputs.
Responsible AI
Governance & complianceDeveloping and deploying AI systems that are ethical, transparent, and fair.
EU AI Act
Governance & complianceEU regulation that sets risk-based obligations for AI systems, including data-governance, transparency, and human-oversight requirements for high-risk uses.
Why it matters: Raises the bar on documenting what data trained and feeds your AI.
NIST AI RMF
Governance & complianceAlso: NIST AI 100-1
The NIST AI Risk Management Framework — voluntary US guidance organized around four functions: Govern, Map, Measure, Manage.
ISO/IEC 42001
Governance & complianceThe international standard for an AI management system (AIMS).
OWASP Top 10 for LLM Applications
Governance & complianceAlso: OWASP LLM Top 10
A community-maintained list of the most critical security risks for applications built on large language models.
Why it matters: A shared checklist for security reviews of AI apps.
AI security posture management (AI-SPM)
Governance & complianceAlso: AI-SPM
Continuous discovery and assessment of AI models, pipelines, and data flows for misconfigurations and exposure.
Why it matters: Discovery tells you where the fire is; enforcement is the sprinkler system.
Data security posture management (DSPM)
Governance & complianceAlso: DSPM
Continuous visibility into data risk across cloud, applications, and AI.
Data access governance (DAG)
Governance & complianceControlling and monitoring who can access what data, and why.
Attribute-based access control (ABAC)
Governance & complianceAlso: ABAC
Permissions determined dynamically by user attributes and context.
Purpose-based access control
Governance & complianceData access allowed only when the intended use matches an approved purpose.
Why it matters: The right model for agents: each tool call justifies the fields it receives.
Access control
Governance & complianceProcesses determining which users can access which data.
Zero trust data
Governance & complianceA security model that treats every access request as untrusted until validated.
Data sovereignty
Governance & complianceEnsuring data stays within required national or regional boundaries.
Personally identifiable information (PII)
Governance & complianceAlso: PII
Data that can identify an individual, directly or indirectly.
Protected health information (PHI)
Governance & complianceAlso: PHI
Health-related personal data governed by HIPAA in the US.
GDPR
Governance & complianceAlso: General Data Protection Regulation
EU regulation requiring strict controls on personal data collection and processing.
PCI DSS
Governance & complianceThe Payment Card Industry Data Security Standard for organizations that handle cardholder data.
Homomorphic encryption
Privacy-enhancing techEncryption that allows computation on encrypted data without decrypting it.
Secure multi-party computation
Privacy-enhancing techAlso: SMPC
Multiple parties jointly compute a result without revealing their private inputs.
Differential privacy
Privacy-enhancing techAdding calibrated noise to data or results to prevent identification of individuals.
Synthetic data
Privacy-enhancing techArtificially generated data that mimics real datasets without exposing personal information.
Why it matters: Useful for testing; can degrade models if overused (see model collapse).
Confidential computing
Privacy-enhancing techProtecting data while it is being processed, using secure hardware environments.
Trusted execution environment (TEE)
Privacy-enhancing techAlso: TEE
A hardware-isolated area that securely runs sensitive code and data.
Large language model (LLM)
LLM & RAG fundamentalsAlso: LLM
AI trained on massive text datasets to understand and generate language — GPT, Llama, Claude, Mistral and others.
Token (LLM)
LLM & RAG fundamentalsA chunk of text — roughly three-quarters of a word — that a model processes.
Why it matters: How models read text and how API pricing works. Distinct from data tokenization.
Inference
LLM & RAG fundamentalsRunning a trained model to generate output.
Why it matters: What happens every time a prompt is sent.
Context window
LLM & RAG fundamentalsThe maximum number of tokens a model can consider at once.
Why it matters: Limits how much text you can send — and how much sensitive data one prompt can hold.
System prompt
LLM & RAG fundamentalsHidden instructions that shape a model’s behavior before user input.
Why it matters: The model’s job description — and a target for injection.
Fine-tuning
LLM & RAG fundamentalsFurther training a model on specific data to improve it for a use case.
Why it matters: Whatever is in the fine-tuning set can be memorized.
LoRA (Low-Rank Adaptation)
LLM & RAG fundamentalsAn efficient fine-tuning method using small adapter layers.
RAG (retrieval-augmented generation)
LLM & RAG fundamentalsAlso: RAG pipeline
Connecting an LLM to external knowledge by retrieving relevant documents and adding them to the prompt.
Why it matters: How enterprises ground AI in their own data.
Vector embeddings
LLM & RAG fundamentalsAlso: Embeddings
Numerical representations of text that capture meaning for semantic search and AI reasoning.
Vector database
LLM & RAG fundamentalsA database optimized for similarity search over embeddings.
Why it matters: A new copy of your data that needs its own protection.
Semantic search
LLM & RAG fundamentalsFinding content by meaning, not keywords — “data protection” matches “information security.”
Hybrid search
LLM & RAG fundamentalsCombining semantic and keyword search.
Chunking
LLM & RAG fundamentalsSplitting documents into smaller pieces for retrieval.
Why it matters: Sensitive values end up scattered across chunks — protect them before splitting.
Grounding
LLM & RAG fundamentalsBasing AI responses on retrieved facts.
Why it matters: Reduces hallucinations by anchoring answers to real data.
Reranking
LLM & RAG fundamentalsRe-scoring retrieved results for relevance before sending them to the model.
Knowledge graph
LLM & RAG fundamentalsA database of entities and their relationships — Person → works_at → Company.
Graph RAG
LLM & RAG fundamentalsRAG that retrieves from knowledge graphs instead of, or alongside, vectors.
Why it matters: Better for structured data and multi-hop reasoning.
Multi-hop reasoning
LLM & RAG fundamentalsFollowing multiple relationships to answer a question — “Who manages the person who wrote this doc?”
Multi-turn conversation
LLM & RAG fundamentalsBack-and-forth dialogue where context accumulates.
Why it matters: Attacks can span turns.
Model collapse
LLM & RAG fundamentalsPerformance degradation from training on AI-generated data.
Data security mesh
ArchitectureA distributed architecture for consistent, scalable data protection across environments.
Data perimeter
ArchitectureSecurity controls that keep sensitive data within trusted boundaries.
Agent-to-agent (A2A) protocol
ArchitectureAlso: A2A
An open protocol for AI agents to discover and communicate with each other across vendors and platforms.
Why it matters: Data passed between agents needs the same protection as data passed to tools.
API (application programming interface)
ArchitectureA method for systems to communicate and exchange data.
SaaS (software-as-a-service)
ArchitectureCloud-delivered applications managed and updated by the provider.
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The real bottleneck
Locking data down was security. Now it's the bottleneck.
AI projects stall in review because the data isn't trustworthy enough to use freely. Once a record is copied into a prompt, a chunk, a vector, or an agent's context, perimeter controls no longer apply.
Around the data
Controls stay behind. Data moves on.
Network perimeters, app permissions, and DLP at the edge protect where data sits. AI copies it into embeddings, prompts, and tool calls — where those controls never reach.
In the data
Protection travels with every copy.
Sensitive fields are tokenized at the source. Every chunk, vector, and prompt carries the protection. Re-identification happens only under policy, at the moment of authorized use — and it's logged.
Time-to-production estimator
Days, not quarters. Model what review time costs your AI roadmap.
RAG assistants, agents, copilots, models in training
From request to approval to use production data
Use cases shelved or limited to synthetic data
Your assumption — set conservatively
30
months of review time returned across your AI portfolio
5 2.5
months to approval, per use case
5
blocked use cases that could proceed on protected data
Illustrative model. Every input is yours, including the review-time reduction — no Protegrity benchmark is implied. An expert can pressure-test these numbers against your pipeline.
Validate this with an expertUse cases · by AI pattern
Where sensitive data meets AI — and how it stays protected.
Index everything. Retrieve only what each user may see.
Retrieval-augmented generation copies your data into chunks, embeddings, and vector databases — places most access controls never reach.
In financial services
A wealth-advisor assistant answers from client files and CRM notes — account numbers and SSNs are tokens before they are ever embedded.
Where data leaks
- PII leakage
- Indirect prompt injection
- Retrieval poisoning
- Embedding inversion
- Copilot oversharing
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Protect at ingestion
Tokenize sensitive fields before chunking and embedding, so the vector store never holds raw values.
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Filter context
Scan retrieved chunks before the model sees them to stop injected instructions.
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Reveal by policy
Detokenize in the answer only for users entitled to the value — and log every reveal.