Ask HN: What data format does this look like?
Trying to figure out my local bus company's ticketing system.
Here's one of the fields on it, anyone know what it might be?
P08pxI+q7abfvq3LIwspLRy/EWQ= It looks like a base64-encoded 20-byte value, which decodes to: 3f 4f 29 c4 8f aa ed a6 df be ad cb 23 0b 29 2d 1c bf 11 64 The length of a SHA-1 digest is 160 bits = 20 bytes. This does not at all conclusively mean this value may be a SHA-1 digest, but 160 bits is not a length of value that's customarily used for random nonces, random identifiers, and the like. I recommend you suppose it's a SHA-1 digest and work from there. This is some binary Base64 encoded, would be my guess. This is because of the combination of characters and the = at the end. That looks like the text left behind when I got hacked.