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I need a library that implements threshold cryptography. The idea is to use the technique in a replicated system implemented in Java.

So far, I have only found ThresSig (which implements Shoup's Practical Threshold Signatures) and the ECDSA implementation used in TwoFactorBtcWallet. However, I am not sure if ThresSig is a recomendable option, and even though the aforementioned ECDSA implementation is recent, I can't figure out how to use it for what I need. In addition, both options are lacking on documentation. Are there any other (functional) threshold signature libraries besides these two?

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