A comment in the source code seems to describe what you need to do:
MasterSegment is the length of the string at the end of the encrypted data that contains the secret key
To decrypt - we do the following
1. Take masterSegment (88) length - from the right of the data - this has the private key
2. Everything from 0 to the end - master segment is the raw data - that needs to be decrypted
3. Decrypt the 88 characters using the public key - that will give you a pipe separated string of the private key (random guid from MDS) and a time stamp (to scramble it)
4. Now use the private key and decrypt the data stored from step 2.
5. Parse the decrypted data - and rejoice
6. KSUE -means key issue
7. __$$_jmd - the public key that we obtain
__$_s1 : variable name for the Security object in the Helper.js file - that file has the calls to actually decrypt the data.
