# Proxmark3 v4.21611 "BREAKMEIFYOUCAN!" Released

> A huge iCLASS and DESFire release: new `hf iclass blacktears` tear-off attack, live iCLASS key recovery, faster `legbrute`, an internet `lf relay`, plus Qt6 client support and Aliro/SECC/Gallagher additions.

_2026-04-14_

Version **4.21611**, nicknamed **"BREAKMEIFYOUCAN!"**, of the [Iceman fork](https://github.com/RfidResearchGroup/proxmark3) of the Proxmark3 is out. It is a large release heavy on iCLASS attacks and MIFARE DESFire tooling, with new credential ecosystems (Aliro, SECC, Gallagher) and a modernized Qt6 client. Proxmark 3, RDV4 and iCopy-X users get faster brute forcing, new tear-off attacks, and broad new tag support.

## Highlights
- New `hf iclass blacktears` command performs an automated tear-off of block 1 to force a card into non-secure page mode, a clean way to drop iCLASS page protection.
- `hf iclass legbrute` throughput was heavily optimised: recursive cipher functions were replaced with iterative loops, a 256-entry lookup table was added for `select()`, and per-key bitstream overhead was eliminated. Key-range partitioning across threads was also fixed so threads cover non-overlapping slices of the 40-bit keyspace, with an ETA display and resumable keyboard abort.
- New `--live` option on `hf iclass lookup` recovers a reader's key live by simulating a tag and running the lookup against both standard and elite dictionaries; `hf iclass tagsim` was added to quickly simulate a card from a facility code and card number.
- New `hf 14b tearoff` provides an interactive ST25TB/SRx monotonic counter tear-off attack, useful for rolling back single-use counters.
- DESFire tooling expanded significantly: new `hf mfdes brutedamslot`, `bruteisofid`/`selectisofid`, delegated application commands (`getdelegateappinfo`, `createdelegateapp`), plus `dict`/`ascii`/`mad` presets and tag-loss recovery for `hf mfdes bruteaid`.
- New `hf aliro info`/`read`, `hf secc info`/`sim`, `hf gst info`/`read`, and `hf vas info` commands add support for Aliro, iCLASS SE config cards, and related credential templates; MIFARE Classic support was added to `hf gallagher`.
- `wiegand encode`/`decode` gained support for the new 96-bit ASN.1 encoded format and `--bin` encoding, with unified parameters and verbose PACS output.
- New `lf relay` command relays between two Proxmark3 devices over the internet, and the client now builds with **Qt6** plus added binary hardening across host platforms.

## Contributors
This release landed thanks to [@antiklesys](https://github.com/antiklesys), [@kormax](https://github.com/kormax), [@iceman1001](https://github.com/iceman1001), [@team-orangeBlue](https://github.com/team-orangeBlue), [@cindersocket](https://github.com/cindersocket), [@xNovyz](https://github.com/xNovyz), [@doegox](https://github.com/doegox), [@pingu2211](https://github.com/pingu2211), [@recursivenomad](https://github.com/recursivenomad), and [@apply-science](https://github.com/apply-science).

Read the [full changelog and downloads on GitHub](https://github.com/RfidResearchGroup/proxmark3/releases/tag/v4.21611).