Apr 6, 202612 minutes
Is Slack Encrypted? What You Need to Know in 2026
Slack uses TLS 1.2+ and FIPS 140-2 at-rest encryption, but is NOT end-to-end encrypted — including with EKM. Facts, architecture, and safer ways to share secrets.
From the blog
Privacy & Security Blog
Privacy-focused guides on secure messaging and data protection.
Featured articles
18 articles
Apr 6, 20269 minutes
How to Share Passwords Securely in 2026 — The Complete Guide
Never send passwords through email or Slack. Learn how to share passwords securely using one-time encrypted links that self-destruct after viewing.
Apr 6, 202614 minutes
Best Secure Communication Tools for Enterprise in 2026
Compare enterprise secure messaging — Wire MLS, Threema Work, AWS Wickr, Element, Mattermost, Slack, Teams — plus zero-knowledge credential sharing.
Apr 6, 202610 minutes
What Is Zero-Knowledge Encryption? A Complete Guide for 2026
Zero-knowledge encryption means the provider stores ciphertext it cannot decrypt. How it differs from E2EE and zero-knowledge proofs, plus URL-fragment secret sharing.
Apr 6, 20269 minutes
Burn After Reading: How Self-Destructing Messages Work in 2026
Burn after reading destroys ciphertext after one view. How ZK self-destructing links work vs Snapchat-style UI disappearing and timer-only chats.
Sep 28, 202513 minutes
VanishingVault vs OneTimeSecret: Privacy-First vs Traditional Secret Sharing in 2026
OneTimeSecret documents server-side encryption; VanishingVault uses client-side AES-256-GCM with a URL-fragment key. Compare trust models and self-hosting.
Sep 28, 202514 minutes
SecretDropBox vs Privnote: When Consumer Solutions Aren't Enough for Business
Compare Privnote and VanishingVault on encryption transparency, fragment keys, ads/phishing risk, and when consumer self-destruct notes are not enough.
Sep 13, 202512 minutes
The NPM Supply Chain Attack That Could Have Changed Everything: How Swift Action Prevented a Crypto Catastrophe
Learn how a sophisticated NPM supply chain attack targeting crypto transactions was prevented through swift community response and enterprise security measures.
Sep 1, 20259 minutes
Send a Password as a One-Time Link (Secure & Self-Destructing)
Send passwords via encrypted one-time links that self-destruct after viewing. AES-256-GCM in the browser, key in the URL fragment — no email trails or Slack history.
Sep 1, 20258 minutes
Share 2FA Backup Codes Once (Burn After Read Security)
Share 2FA/MFA backup codes with a zero-knowledge burn-after-read link, then store them in a password manager and regenerate.
Aug 10, 202511 minutes
Enterprise API Key Management: Why One-Time Secrets Beat Traditional Vaults
When one-time encrypted links beat chat for API key handoffs — and when HashiCorp Vault or cloud secrets managers still win for runtime secrets.
Aug 9, 20258 minutes
The Complete Guide to Secure File Sharing Without Cloud Storage
Learn how to share sensitive files securely without relying on traditional cloud storage providers. Explore zero-knowledge alternatives and privacy-first solutions.
Aug 8, 202510 minutes
Zero-Knowledge vs End-to-End Encryption: What's the Difference in 2026?
ZK vs E2EE vs encryption-at-rest: who holds the keys, what providers can read, subpoena nuance, and how URL-fragment secret sharing fits.
Aug 3, 202512 minutes
How We Built a Zero-Knowledge Secret Sharing Tool with Cloudflare in 5 Days
Technical deep dive: AES-256-GCM in the browser, URL-fragment keys (RFC 9110), Cloudflare Workers + KV, burn-after-read, threat model, and KV vs Durable Objects.
Jul 25, 202510 minutes
The Best One-Time Secret Sharing Tools in 2026
Compare top one-time secret tools for 2026 by encryption model: client-side zero-knowledge vs server-side. Bitwarden Send, scrt.link, OneTimeSecret, and more.
Jul 15, 20259 minutes
How to Share Secrets with AI Agents Without Exposing Credentials
Hand API keys to AI agents without pasting into chats: one-time ZK links for handoffs, vaults/OIDC/env for runtime, honest bearer-URL limits.
Jul 5, 20258 minutes
Why Zero-Knowledge Architecture Should Be the Default
Why client-side encryption and URL-fragment keys are the default for one-time secret sharing — plus honest limits (browser trust, bearer URLs).
Jun 5, 20256 minutes
One-Time Secrets vs Traditional Sharing Methods
Compare one-time secret sharing with traditional methods like email and messaging.
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