这些看起来是base64编码，可是怎么不法解出来

这些的确像Base64编码的结果, 不过Base64解码的结果是字节(当然如果源是可读字符串的话, 解码的结果也会是可读的字符串).
就你给的例子, Base64解码的结果如下:
cYzxXGonyuc=
[71] [8C] [F1] [5C] [6A] [27] [CA] [E7]
QExA3EtM2Fnd8hRyIBo2HXffIDSxytD3BLI4697b5eR3iPdZveBmkg==
[40] [4C] [40] [DC] [4B] [4C] [D8] [59]-[DD] [F2] [14] [72] [20] [1A] [36] [1D]
[77] [DF] [20] [34] [B1] [CA] [D0] [F7]-[04] [B2] [38] [EB] [DE] [DB] [E5] [E4]
[77] [88] [F7] [59] [BD] [E0] [66] [92]
XnCFkGwplVA=
[5E] [70] [85] [90] [6C] [29] [95] [50]
WjuQgIOJlr0=
[5A] [3B] [90] [80] [83] [89] [96] [BD]
t0vrWdXieEM=
[B7] [4B] [EB] [59] [D5] [E2] [78] [43]

可能是在base64基础上再加过算法吧。