What encryption format is being used?

I am trying to figure out what encryption the following data is using. The first two numbers are the character lengths of the encrypted lines. This is the first 10 lines of the file. The key is 123456, but I am not sure what the algorithm is. This is an export of data from a Toshiba printer, and I have chosen different amounts of data to export which results in somewhat different results. Excluding line 1, the files are identical for the first 70 lines:

45 14990 3WcwHnuHYT8zzVBsqscbpnHpmL/ON4o/YokvaJxuOUY=
 AlqaZXhNvmxAP+KcfVEWX8zgWnYKHXriMuVn+YnMO3SOhWVTSO3R/iIn4vCG2+6WQYuTD3vf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45 26735 4aQIQ7kRxJjtPpmGBGvtIfWDUKLrcrzP9xKEicM60bA=
 AlqaZXhNvmxAP+KcfVEWX8zgWnYKHXriMuVn+YnMO3SOhWVTSO3R/iIn4vCG2+6WQYuTD3vf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Does anyone know what encryption algorithm this is using?