>>>I want to crypy a string. But that string must readable. I mean that crypted string must have A..Z, 0...9 ....
>>>
>>>Is there any crypt library do that? cipher doesn't do that...
>>
>>You can use STRCONV(, 13) to convert encripted string to encoded base64 or STRCONV(, 15) to encoded hexBinary
>
>But can that string be converted back?

Yes, with STRCONV(, 14) and STRCONV(, 16) respectively.