Verify Private key Backup (SA account)

[Rueoban]

Hi guys,

Recently I installed Mycelium wallet and imported my wallet address into the SA account. From here, I tried to create backup and it gave all the 12 new seed phrase and 15 characters with checksum password. Also, I received a PDF format mentioning that "the embedded PDF viewer in Windows 8 cannot display the QR codes properly." which need to scan the QR code where it doesn't appear in the PDF. I tried in another device also it doesn't appear at all. This is actually when it comes to the final steps which is scanning the private key. Now I'm lost here, but in the PDF it has 2nd page describing with decrypting and verifying an encrypted private key method.

2nd page of the PDF
Example : parsing the QR code
decoding the 3 header bytes
aes key derivation
decrypting the content data
verifying checksum
cryptographic functions used

These are the methods shown with some functional codes. Can please help me to explain on this. Thank you guys.

[Rueoban]

Hello guys, can someone please assist. Thank you