Credential Security

Astonish provides a secure credential store that keeps API keys, tokens, and other secrets encrypted at rest and invisible to the LLM at runtime. A multi-layer redaction pipeline ensures that secrets never leak into model context, logs, or responses.

Credential Store

Credentials are stored encrypted using envelope encryption and scoped to either a user (personal) or a team:

Scope	Visibility	Use Case
Personal	Only the owning user	Dev/testing API keys
Team	All team members	Shared production credentials

Credential Types

Type	Description
api_key	Custom header + value for API authentication
bearer	Authorization: Bearer token
basic	HTTP Basic Auth (username + password)
password	Username + password for SSH, FTP, SMTP, databases
oauth_client_credentials	OAuth2 client credentials with automatic token refresh
oauth_authorization_code	User-authorized OAuth2 with refresh token

Output Redaction

Astonish applies multiple independent redaction layers to guarantee secrets never reach the LLM context:

Layer	Stage	Mechanism
1	Injection	Secrets are injected into tool call environments via placeholders, never into the prompt
2	Tool output filtering	Tool stdout/stderr is scanned; matching values are replaced with [REDACTED]
3	Context assembly	The context builder verifies no known secret values appear in assembled messages
4	Channel output	Outbound messages to channels (Telegram, Slack, etc.) are scanned against active credentials
5	Audit and logs	All logging pipelines strip secret values before writing

Each layer operates independently. If one layer fails, the remaining layers still prevent exposure.

How Secrets Reach Tools

When an agent invokes a tool that requires credentials:

1. The credential is resolved (personal-first, team fallback).
2. The encrypted ciphertext is decrypted in memory using the org's DEK.
3. The plaintext is injected as an environment variable into the sandbox container.
4. The tool reads the credential from its environment.
5. After execution, the environment is destroyed with the container.

At no point does the LLM see the credential value. The model only knows that a credential named (e.g.) GITHUB_TOKEN is available — never its contents.

Managing Credentials

In Studio

Studio provides a credential manager under Settings → Credentials where you can add, view metadata, test, and remove credentials through a visual interface.

Via CLI

# Add a credential
astonish credential add

# List credentials (values are never displayed)
astonish credential list

# Show credential metadata
astonish credential show <name>

# Test a credential (validates it works)
astonish credential test <name>

# Remove a credential
astonish credential remove <name>

# Set or manage the master key
astonish credential master-key

Credential values are never echoed back in any command output. The list and show commands display names, types, scopes, and metadata only.

See Also

• Envelope Encryption — how credentials are encrypted at rest
• Sandboxes — the isolated execution environment where credentials are consumed
• Audit Logging — all credential access is recorded