DrugHub OPSEC & Connection Guide: From Tor Browser Setup and DDoS Troubleshooting to Passwordless PGP Login

1. Tor Browser and .onion connections

Why a v3 .onion address needs Tor

The 56 base32 characters before a v3 .onion suffix identify an onion service through its cryptographic key. Public DNS cannot resolve it. Tor Browser builds a circuit to meet the service at a rendezvous point, without a conventional exit relay. A standard browser needs a Tor connection to open that address.

Tor limits what individual relays can observe, but the page still receives anything you submit, and a compromised device can record it locally. Other apps on that device need their own privacy review.

Install Tor Browser; use bridges when Tor is blocked

Follow the Tor Project (Tor Project) instructions to install and verify the download. Let the browser finish connecting before testing an address. On public Wi-Fi, consider who can see your screen and what the network's policies permit. Home Wi-Fi says nothing about who operates the destination.

If the network blocks direct Tor access, configure a bridge in the browser's connection settings. obfs4 disguises Tor traffic; Snowflake routes it through volunteer proxies. On supported mobile installations, use the app's built-in bridge settings. Bridges solve a blocked Tor connection. If Tor already works, investigate the failing site directly rather than switching bridges.

2. Tor connection problems, CAPTCHA loops and DDoS load

When an onion page will not load

Start with Tor's connection status and the system clock. If Tails reports Tor is not ready, wait for it to connect rather than reloading the page. When only one service stalls, try New Tor Circuit for this Site. That control cannot restore a retired address.

If Wi-Fi itself fails, check the network adapter and the Tails MAC-address anonymization setting. Changing that setting has privacy implications on the local network. If other onion services load normally, the fault likely lies with the destination. Avoid replacement links from unverified searches.

CAPTCHA retries and Proof-of-Work

An expired challenge or lost session state can lock a CAPTCHA into a loop. Reload once and review the site's session settings without weakening protections site-wide. Platform documentation describes "few or no captchas," but an individual visit may still encounter one.

Some onion services use Proof-of-Work (PoW) to raise the cost of request floods. Your device solves a small puzzle before the service accepts the connection. Under DDoS load, expect higher CPU use or a longer wait. PoW says nothing about the service's identity, regardless of how demanding the prompt appears.

One link fails; Tor still works

Congestion, an outage, and a withdrawn address are indistinguishable from your browser. Open another onion service you already trust to confirm whether Tor itself is working. A single timeout tells you nothing definitive about a DDoS attack or the platform's status.

3. DrugHub OPSEC: browser settings and local storage

Browser fingerprints and the Safest setting

Scripts and extensions can expose browser details; unusual settings can make a browser easier to fingerprint. Check Safest after each Tails restart. The two about:config preferences below are documented from the Tor Browser 14.0 era, so verify your version's defaults before changing either one.

What the operating system retains

Operational security (OPSEC) covers the files and traces a device retains after a session. A VPN changes who can observe the connection; it does nothing about malware or plaintext files already on the disk. The systems below differ in their degree of isolation, storage model, and recovery options.

Encrypted files and a backup you can restore

Tails Persistent Storage uses LUKS encryption. Enable the features you need, restart, and confirm your files survived the cycle. A KeePassXC .kdbx database can store passphrases, though clipboard clearing cannot undo a mistaken paste.

Keep an encrypted backup on a separate device and periodically test restoring a file from it. An rsync --del command can silently delete backup files when a device path resolves incorrectly. Use a non-destructive copy instead.

4. DrugHub passwordless PGP login and account access

Browsing without an account; signing in with a key

Platform documentation allows browsing without registration and specifies PGP-only sign-in, using a public key in place of a username and password. An RSA key under a pseudonym is one documented example; accepted key types are not fully specified here.

Keep the private key and its backup offline. A real name or email address in the key's user ID can identify you even through Tor.

What the PGP challenge proves

Two-factor authentication uses PGP signatures, with no PIN or mnemonic involved. Depending on the challenge, you sign or decrypt something locally. The private key and its passphrase stay off the website at all times.

A successful challenge demonstrates that the responder controls the private key. A proxy can still relay that response. The requests listed in the table below warrant a pause; passing them does not authenticate the page itself.

If the private key is lost

Check a tested, encrypted backup first. The published account model has no password or mnemonic fallback, and a new key will not automatically restore the old account. Platform rules direct support requests to on-platform Support Chats. Verify the destination before using them.

Even with the correct key in hand, a proxy clone can relay a login challenge while altering every page you see. Part 2: PGP verification and anti-phishing covers the separate check on who controls the address.

Tor connections and PGP login: common questions