The proxy multi-signature scheme called YBX is not safe. An attacker can forge the key pair of proxy signature without the original private key, and disguise himself as proxy to sign document.
YBX代理多重签名方案是不安全的，攻击者在不知道原始签名者密钥的情况下，能够伪造代理签名密钥，假冒代理签名者对文件进行签名。
The proxy multi-signature scheme called YBX is not safe. An attacker can forge the key pair of proxy signature without the original private key, and disguise himself as proxy to sign document.
YBX代理多重签名方案是不安全的，攻击者在不知道原始签名者密钥的情况下，能够伪造代理签名密钥，假冒代理签名者对文件进行签名。
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