Verifying PGP Signatures on BlackOps Market
PGP is the backbone of trust on BlackOps Market. But a signature is only as good as the key behind it. Here is how to verify that a signature is real.
Step one: get the public key. Find the key on the BlackOps Market website, usually in the security or FAQ section. Note the fingerprint. This is a long string of hexadecimal characters. Now, cross-reference this fingerprint with a second source. This could be the original launch post on a trusted forum, or a statement from a known vendor. If the fingerprints match, proceed. If they differ, stop. Something is wrong.
Step two: import the key. Use GnuPG on Linux or macOS. Use Kleopatra on Windows. Import the public key. Ensure it is marked as trusted or at least confirmed. You do not need to mark it as ultimate trust, but you should know who signed it.
Step three: check the canary signature. Go to the front page of any mirror. Locate the warrant canary. It includes a block of armored text. This is the signed message. Save this text to a file. Run the verify command. In GnuPG, this is gpg --verify canary.txt.
Look at the output. You want to see Good signature from the signer name. This means the signature was created by the holder of the private key corresponding to the public key you imported. It means the message has not been altered since signing.
What if you see BAD signature? This means the key is wrong, or the message was modified. Check the fingerprint again. Did you import the right key? Is the canary text complete? Sometimes, line breaks get mangled during copy-paste. Clean up the text and try again.
If the fingerprint does not match your expected value, do not trust the signature. A mismatch indicates a key replacement attack or a simple error. Assume the mirror is untrusted until resolved.
Timing matters. The canary is re-signed weekly. If the signature is from eight days ago, treat all mirrors as untrusted. The weekly cycle is a signal of liveness. If the operators stop signing, the market may be down, or they are being cautious. In either case, wait for the next update.
The risk here is key management. If you lose your own private key, you cannot sign disputes. If you import a malicious key, you might trust a fake canary. Double-check everything. Trust, but verify, literally.