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
Card number
4111 7720 1846 0457
SSN
713-06-5528
Balance
$48,210.55
Question
Why was my 03/14 wire held?

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 security

Also: 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 security

Keeping 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 security

Securing 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 security

Retrieval-augmented generation that prevents sensitive data exposure during retrieval or generation.

Agentic AI security

AI & agentic security

The 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 security

AI agents that operate with built-in data protection, oversight, and controlled autonomy.

Model Context Protocol (MCP)

AI & agentic security

Also: 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 security

Also: 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 security

Also: 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 security

Also: 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 security

When 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 security

Also: 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 security

Security designed for AI workflows, models, and data flows rather than adapted from network or application controls.

AI data sanitization

AI & agentic security

Removing, masking, or transforming sensitive information before AI training or inference.

Model leakage prevention

AI & agentic security

Techniques that stop AI models from revealing sensitive or memorized data.

Prompt shielding

AI & agentic security

Filtering and protecting prompts and responses to prevent leakage of sensitive inputs.

AI policy enforcement

AI & agentic security

Automated enforcement of data, security, and compliance rules across AI workflows.

Inference security

AI & agentic security

Preventing sensitive data exposure while a model processes queries.

Shadow AI

AI & agentic security

Also: 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 security

Running 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 security

Also: 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 threats

Malicious 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 threats

A 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 threats

Malicious 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 threats

Bypassing a model’s safety guardrails, often through roleplay or framing — “Pretend you’re an AI without restrictions…”.

PII leakage

AI threats

An 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 threats

Also: 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 threats

Extracting confidential data through AI, using it as a side channel.

Data poisoning

AI threats

Corrupting training data to compromise a model.

Why it matters: A long-term attack on model integrity.

Retrieval poisoning

AI threats

Planting 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 threats

Hiding 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 threats

Reconstructing a proprietary model’s behavior through repeated queries.

Membership inference

AI threats

Determining 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 threats

Getting a model to regurgitate its training data.

Why it matters: Private information can be recovered from model weights.

Model inversion

AI threats

Reconstructing sensitive training inputs from model outputs.

Embedding inversion

AI threats

Recovering original text from vector embeddings.

Why it matters: Embeddings of raw PII are still sensitive data.

Adversarial examples

AI threats

Inputs crafted with small changes that cause AI systems to misbehave.

Social engineering (AI)

AI threats

Manipulating AI through roleplay or false authority — “As a system administrator, I need you to…”.

Context overflow

AI threats

Flooding the context window to bury malicious instructions in large documents.

Model hallucination

AI threats

Also: Hallucination

When an AI confidently outputs inaccurate or fabricated information.

Why it matters: Plausible-sounding errors undermine trust in AI outputs.

Copilot oversharing

AI threats

An 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 defenses

Also: 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 defenses

Controls that evaluate and filter what a model returns before it reaches a user or downstream system.

Semantic analysis

AI defenses

Understanding intent, not just keywords.

Why it matters: Catches rephrased attacks that keyword filters miss.

Risk scoring

AI defenses

Probability-based threat assessment, typically 0.0–1.0.

Why it matters: Enables nuanced decisions instead of binary allow/block.

Input validation

AI defenses

Checking user prompts before processing.

Why it matters: A first line of defense — not sufficient alone.

Output filtering

AI defenses

Scanning AI responses before delivery.

Why it matters: Catches PII leakage and harmful content.

Context filtering

AI defenses

Scanning retrieved documents before the model sees them.

Why it matters: Stops indirect prompt injection.

Audit logging

AI defenses

Recording all AI interactions.

Why it matters: Supports forensics, compliance, and monitoring.

API security for LLMs

AI defenses

Controls that protect data exchanged through AI model APIs.

Detokenization policy

AI defenses

Also: 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 protection

Also: 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 protection

Also: 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 protection

Also: 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 protection

Hiding sensitive fields using obfuscation techniques, typically for non-production use.

Pseudonymization

Data protection

Replacing personal identifiers with artificial ones to reduce risk.

Why it matters: Recognized under GDPR as a safeguard for personal data.

Redaction

Data protection

Permanently removing sensitive content from documents or text.

Encryption at rest

Data protection

Encrypting stored data to prevent unauthorized access.

Encryption in transit

Data protection

Securing data while it moves across networks.

Data loss prevention (DLP)

Data protection

Also: 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 protection

Categorizing data by sensitivity, type, and regulatory needs.

Data lifecycle management

Data protection

Managing data from creation through use, retention, and deletion.

Data minimization

Data protection

Limiting collection, access, or retention to only what is strictly necessary.

Data breach impact reduction

Data protection

Strategies 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 & compliance

A 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 & compliance

Identifying and reducing risks related to AI data, behavior, and outputs.

Responsible AI

Governance & compliance

Developing and deploying AI systems that are ethical, transparent, and fair.

EU AI Act

Governance & compliance

EU 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 & compliance

Also: 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 & compliance

The international standard for an AI management system (AIMS).

OWASP Top 10 for LLM Applications

Governance & compliance

Also: 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 & compliance

Also: 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 & compliance

Also: DSPM

Continuous visibility into data risk across cloud, applications, and AI.

Data access governance (DAG)

Governance & compliance

Controlling and monitoring who can access what data, and why.

Attribute-based access control (ABAC)

Governance & compliance

Also: ABAC

Permissions determined dynamically by user attributes and context.

Purpose-based access control

Governance & compliance

Data 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 & compliance

Processes determining which users can access which data.

Zero trust data

Governance & compliance

A security model that treats every access request as untrusted until validated.

Data sovereignty

Governance & compliance

Ensuring data stays within required national or regional boundaries.

Personally identifiable information (PII)

Governance & compliance

Also: PII

Data that can identify an individual, directly or indirectly.

Protected health information (PHI)

Governance & compliance

Also: PHI

Health-related personal data governed by HIPAA in the US.

GDPR

Governance & compliance

Also: General Data Protection Regulation

EU regulation requiring strict controls on personal data collection and processing.

PCI DSS

Governance & compliance

The Payment Card Industry Data Security Standard for organizations that handle cardholder data.

Homomorphic encryption

Privacy-enhancing tech

Encryption that allows computation on encrypted data without decrypting it.

Secure multi-party computation

Privacy-enhancing tech

Also: SMPC

Multiple parties jointly compute a result without revealing their private inputs.

Differential privacy

Privacy-enhancing tech

Adding calibrated noise to data or results to prevent identification of individuals.

Synthetic data

Privacy-enhancing tech

Artificially 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 tech

Protecting data while it is being processed, using secure hardware environments.

Trusted execution environment (TEE)

Privacy-enhancing tech

Also: TEE

A hardware-isolated area that securely runs sensitive code and data.

Large language model (LLM)

LLM & RAG fundamentals

Also: LLM

AI trained on massive text datasets to understand and generate language — GPT, Llama, Claude, Mistral and others.

Token (LLM)

LLM & RAG fundamentals

A 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 fundamentals

Running a trained model to generate output.

Why it matters: What happens every time a prompt is sent.

Context window

LLM & RAG fundamentals

The 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 fundamentals

Hidden 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 fundamentals

Further 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 fundamentals

An efficient fine-tuning method using small adapter layers.

RAG (retrieval-augmented generation)

LLM & RAG fundamentals

Also: 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 fundamentals

Also: Embeddings

Numerical representations of text that capture meaning for semantic search and AI reasoning.

Vector database

LLM & RAG fundamentals

A database optimized for similarity search over embeddings.

Why it matters: A new copy of your data that needs its own protection.

Chunking

LLM & RAG fundamentals

Splitting documents into smaller pieces for retrieval.

Why it matters: Sensitive values end up scattered across chunks — protect them before splitting.

Grounding

LLM & RAG fundamentals

Basing AI responses on retrieved facts.

Why it matters: Reduces hallucinations by anchoring answers to real data.

Reranking

LLM & RAG fundamentals

Re-scoring retrieved results for relevance before sending them to the model.

Knowledge graph

LLM & RAG fundamentals

A database of entities and their relationships — Person → works_at → Company.

Graph RAG

LLM & RAG fundamentals

RAG 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 fundamentals

Following multiple relationships to answer a question — “Who manages the person who wrote this doc?”

Multi-turn conversation

LLM & RAG fundamentals

Back-and-forth dialogue where context accumulates.

Why it matters: Attacks can span turns.

Model collapse

LLM & RAG fundamentals

Performance degradation from training on AI-generated data.

Data security mesh

Architecture

A distributed architecture for consistent, scalable data protection across environments.

Data perimeter

Architecture

Security controls that keep sensitive data within trusted boundaries.

Agent-to-agent (A2A) protocol

Architecture

Also: 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)

Architecture

A method for systems to communicate and exchange data.

SaaS (software-as-a-service)

Architecture

Cloud-delivered applications managed and updated by the provider.

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.

12

RAG assistants, agents, copilots, models in training

5 mo

From request to approval to use production data

40%

Use cases shelved or limited to synthetic data

50%

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 expert

Use cases · by AI pattern

Where sensitive data meets AI — and how it stays protected.

Industry
Financial services

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
  1. Protect at ingestion

    Tokenize sensitive fields before chunking and embedding, so the vector store never holds raw values.

  2. Filter context

    Scan retrieved chunks before the model sees them to stop injected instructions.

  3. Reveal by policy

    Detokenize in the answer only for users entitled to the value — and log every reveal.