PSAM_spec

代码说明：

  psam 卡规范，用在数据安全领域。 一些密钥可以 存放在 psam卡里，但是没办法读出，却同样可以达到认证的效果。(PSAM card specification, used in the field of data security. Some keys can be stored in the PSAM Cary, but no way to read out, but the same effect can be achieved certification.)