An alternative to using iron oxide

[jonnyogood]

I tried to extract card information using a card reader and free magstripper software. Apparently squareup card readers are now encrypted, but the encryption can still be disabled using the method described in this paper.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.blackhat.com/docs/us-15/materials/us-15-Mellen-Mobile-Point-Of-Scam-Attacking-The-Square-Reader-wp.pdf&ved=0ahUKEwj3t-6d87_SAhVM6yYKHeSqBfAQFgglMAA&usg=AFQjCNFbDMjJWY5kEg5f2woOva9P5ZSdmQ&sig2=JkCWC4zcodQeX2Cg55w4Kg