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Artículos breves sobre privacidad, cifrado y las herramientas que construyo.
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Firefox Send alternatives in 2026: what Send did, and what still does it
Firefox Send closed in 2020. What made it worth missing, which services still work the same way, and how they differ in size, expiry, encryption and setup.
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How to know when someone has downloaded your file
You sent a link: did the file arrive? What download notifications really measure, how WeTransfer and Google Drive handle it, and how to be told without an account.
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How to collect files from clients securely, without email attachments
A file request link lets clients upload documents to you without an account. With end-to-end encryption, only your browser can open what they send.
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Burn after reading: what actually eats a one-time link
What consumes a one-time ttl.space link and what doesn't: Slack unfurls, mail scanners, prefetching browsers. And what happens when a download breaks halfway.
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How to share a password securely in 30 seconds
Passwords sent by WhatsApp, iMessage or email stay in chats and backups for years. A one-time encrypted note is opened once and leaves no copies behind.
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How to send confidential files to your lawyer
How to send documents to outside counsel without leaving a readable copy on a third-party server, and why that matters for privilege.
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How to share API keys and secrets without putting them in Slack
Secrets pasted into Slack, email or Notion outlive the conversation in data exports and audits. A one-time encrypted link is the cleaner handoff.
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How ttl.space's end-to-end encryption works
The cryptography behind ttl.space: XChaCha20-Poly1305 chunks, Argon2id key derivation, what the server stores, and why none of it can decrypt your file.