www.un.org/Depts/DGACM/index_spanish.htm 或者:如何储存用户的加密数据?
我承认,这是一个不容置疑的问题,私人钥匙仅限于一个人,因为这个术语已经意味着。 但我有以下设想:
用户Tom输入需要储存在数据库中的数据。 用户决定希望向Jim和Bob提供这一信息。 用户John和Jayne不能加以加密。 当然,也不要让用户时间对服务器进行 ha缩,并能够查阅加密数据和进行加密/加密的文字。
我认为与PHPs(opensl_public_en加密/a> 由于两个用户需要具备“私人”数据加密的关键,因此功能在这里赢得了t工作。
我猜想这个相当一般性的问题,但如果这个问题很重要,就必须在公共卫生和公共卫生部(和MySQL可能)中处理。
That s how it done in OpenPGP (and, other systems): - you are generating secret symmetric key, which is used to encrypt the data itself; - then, this symmetric key is encrypted with Tom s key; - also, symmetric key can be encrypted with Jim s and Bob s public key, allowing them to decrypt the key and after that to decrypt the data
PHP提供这一功能: opensl_seal(。 这项职能涉及一系列公共钥匙,并对数据进行加密,以便任何相应的私人钥匙均可用于加密(http://php.net/openssl_open> opensl_open(/a>)。
我没有PHP的图书馆。 但总的来说,程序如下:
在研究“PHP和PKCS7”时,应当取得一些成果。
Use a data encryption key (call it Kgeneral) that s distinct from Tom s key.
• 给Tom公用钥匙的“普通”加密,并向Tom提供结果——他可以使用其私人钥匙进行加密并获取Kgeneral。
如果另一个用户需要获得数据,那么Tom(或您的申请)可以将其公用钥匙加密,并允许他查阅。
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