How to find out the method used to encrypt [closed]

How to find out the method used to encrypt the string 123456 which results in the value: 6g9SkDLIKa8l2VhafFnHvg==?

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closed as off-topic by DrLecter, poncho, otus, e-sushi, Ilmari KaronenJun 29 at 21:52

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "Requests for analyzing or deciphering a block of data are off-topic here, as the results are rarely useful to anyone else." – DrLecter, poncho, otus, e-sushi, Ilmari Karonen
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