ZERO-KNOWLEDGE DEVELOPER TOOL

Share API Keys Securely

Stop pasting API keys into Slack DMs and email threads. CloakBin encrypts your secrets in the browser using AES-256-GCM before anything touches the server. The decryption key stays in the URL fragment — never stored, never logged, never accessible to us.

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Why Sharing API Keys Over Slack or Email Is Dangerous

Most teams share API keys the way they share everything else: a quick Slack DM or an email. But those channels were never designed for secrets. Messages persist in compliance archives, search indexes, and backups that you do not control.

The Threat in Numbers

12.8M
Hardcoded secrets detected in public repos in 2023 (GitGuardian)
$4.45M
Average cost of a data breach in 2023 (IBM)
80%
Of breaches involve compromised credentials (Verizon DBIR)

What Goes Wrong

  • Slack messages sit in compliance exports and admin-searchable archives indefinitely
  • Email forwards, auto-complete, and CC leaks put keys in unintended inboxes
  • Developers copy keys from chat into code, which gets committed to version control
  • Compromised Slack workspaces or email accounts expose every secret ever shared

How to Share API Keys with CloakBin

1

Paste Your API Key

Paste the API key, token, or secret into the CloakBin editor. Select the appropriate syntax highlighting if sharing a config file.

2

Encrypted in Your Browser

AES-256-GCM encryption runs entirely in your browser. A random key is generated and your API key is encrypted before anything is sent to the server.

3

Enable Burn After Read

Toggle burn-after-read so the paste self-destructs after your teammate views it once. Set an expiry as a fallback if they forget to open it.

4

Share the Link

Send the generated link over any channel. The decryption key lives in the URL fragment (#key) which browsers never send to servers.

https://cloakbin.com/abc123#encryption-key-here
Sent to server
Stays in browser only

Best Practices for API Key Sharing

Always Use Burn After Read

For API keys, burn-after-read is non-negotiable. The paste self-destructs after one view, leaving zero trace on the server.

Set Short Expiry Times

Even without burn-after-read, set the shortest expiry possible. A 1-hour window is usually enough for a teammate to grab the key.

Rotate Keys After Sharing

Treat every shared key as potentially compromised. Rotate it after the recipient has configured their environment.

Never Use Slack or Email

Slack retains messages in compliance archives. Email sits in inboxes indefinitely. Both are discoverable in breaches and legal requests.

Use Scoped Keys When Possible

Share the most restricted key possible. Read-only, single-service, IP-restricted keys limit blast radius if intercepted.

Verify the Recipient

Send the CloakBin link and the context in separate channels. Confirm your teammate received and used the key before it expires.

CloakBin vs Other Ways to Share API Keys

FeatureCloakBinSlack DMsEmail1Password
End-to-end encrypted
Self-destructs after viewing
No message history / audit trail risk
No account required to share
Recipient needs no account
Server cannot read the secret
Free tier available

Frequently Asked Questions

Is it safe to share API keys over CloakBin?
Yes. CloakBin uses AES-256-GCM encryption entirely in your browser. The encryption key is placed in the URL fragment (#key), which browsers never send to the server per the HTTP specification. Our servers only ever store ciphertext that is mathematically impossible to decrypt without the key. Combined with burn-after-read, the ciphertext is also deleted after a single view.
Why is sharing API keys over Slack or email dangerous?
Slack retains all messages in its compliance archive, and workspace admins can export entire message histories. Email sits in inboxes, sent folders, and backups indefinitely. Both are common targets in data breaches. In 2023, GitGuardian detected over 12.8 million hardcoded secrets in public repositories alone — many originating from credentials shared over insecure channels and accidentally committed.
Should I rotate an API key after sharing it through CloakBin?
Best practice is yes. Even with zero-knowledge encryption and burn-after-read, treating every shared key as potentially exposed minimizes risk. Rotate the key once your teammate has configured their environment, so the shared key is no longer valid.
What happens if the recipient does not open the link in time?
If you set an expiry time, the paste is automatically deleted from CloakBin's servers when it expires, whether or not it was viewed. The ciphertext is gone permanently. You would need to create a new paste with the API key and share a fresh link.
Can CloakBin employees read my API keys?
No. CloakBin is built on zero-knowledge architecture. The decryption key only exists in the URL fragment on your device and your recipient's device. Our servers store encrypted ciphertext only. Even if our entire database were compromised, the data would be unreadable without the individual keys.

Share Your API Keys Without the Risk

Zero-knowledge encryption. Burn after read. No account required. Your API key is encrypted in your browser and the server never sees it.

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