The Secure Enclave which amongst others prevents tampering with the microkernel and related modules of iOS was introduced with the A7 SoC. So basically only th

The Secure Enclave which amongst others prevents tampering with the microkernel and related modules of iOS was introduced with the A7 SoC. So basically only the iPhone 5 and older models are easy to compromise, with iPhone 5S and newer it gets a _lot_ harder. Details here, from the mothership itselves: https://www.apple.com/business/docs/iOS_Security_Guide.pdf https://www.apple.com/business/docs/iOS_Security_Guide.pdf