Cause: on Windows Vista, weak encryption ciphers have been disabled and only stronger ciphers are enabled by default.

原因：在Windows Vista中，默认已经关闭了弱密码，仅开启强密码。

youdao

The combination of algorithm and the key length results in having stronger encryption, medium encryption, and weak encryption.

算法和密钥长度的组合产生强加密、中等加密和弱加密。

youdao

It's even more common to find crucial flaws in crypto-graphic algorithm implementations, which can turn strong encryption into weak encryption (or sometimes no encryption at all).

而更为普遍的情况是，加密算法实现被发现具有关键的缺陷，可以让原本的强加密退化成弱加密(有时甚至相当于完全不加密)。

youdao

If these card numbers were in fact stolen from the Playstation Network, it may be that the encryption Sony says it used was weak, badly implemented, or that the decryption key was included in the stolen data.

FORBES: Update: Sony Encrypted Playstation Users' Credit Cards, But Researchers Spot Stolen Cards Online