For College Educators: Electronic Score Reporting

Where does the encrypted data come from, and how does an institution receive it?
After the data is decrypted, what computer processing is necessary?
Does your data require a specific version of PGP?
What's the file extension?
Does each file contain multiple students' scores, or just one student’s scores per file?
Would this replace the paper scores currently sent to us?
How often are files sent? The ESR informational document notes, "Cycles are assigned sequentially and are increased by increments of one each time a file is sent to an institution." Does this mean every file sent to the college will have a unique name?