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mkp224o is a vanity address generator for Tor onion version 3 hidden services, published by cathugger and currently available in version 1.7.0, which is the only version recorded in this catalog. The software serves a single, well-defined purpose: it searches for ed25519 key pairs whose corresponding .onion addresses begin with a user-specified prefix, allowing operators of Tor hidden services to obtain a recognizable or memorable address rather than one that is purely random. Because version 3 onion addresses are derived directly from the public half of an ed25519 key pair, generating a vanity address requires repeatedly creating candidate keys and checking the resulting address, and mkp224o automates this brute-force process. The tool fits into the category of Tor utilities, and more specifically into the subcategory of address generation and hidden service tooling. Its primary use case is for administrators who wish to give their hidden services an address that reflects a project name, brand, or other meaningful string, within the practical limits imposed by the exponential growth of search time as the desired prefix length increases. It can also be relevant for security-conscious operators who want to distinguish their service from impersonators by committing to a unique, hard-to-replicate address prefix. As a standalone generator, it produces key material that must subsequently be integrated into a hidden service configuration; the generation process itself does not require a connection to the Tor network, meaning the search for a suitable key pair can be performed offline before deployment. Users selecting this software should note that the catalog records only the single release 1.7.0, so no alternative or legacy versions are listed for comparison. The publisher, cathugger, is identified solely by that name in the available metadata. Overall, mkp224o occupies a narrow but established niche within the Tor ecosystem, providing a focused solution for generating personalized v3 onion addresses.
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