PL/SQL Developer登入时候报ORA-12638: 身份证明检索失败的解决办法

找到oracleclient安装目录：E:/oracle/product/10.2.0/db_1/NETWORK/ADMIN 打开sqlnet.ora
在里面找到 SQLNET.AUTHENTICATION_SERVICES= (NTS)
将其更改为: SQLNET.AUTHENTICATION_SERVICES= (BEQ,NONE)
或者注释掉：#SQLNET.AUTHENTICATION_SERVICES= (NTS)