What is the difference between PKCS1 v1.5 and PKCS7? Is PKCS7 a superset of specifications in PKCS1 1.5?
What is the difference between PKCS#1 v1.5 and PKCS#7?


PKCS#7 makes use of cryptographic primitives defined by PKCS#1 v1.5.

PKCS#7 is defined in RFC&nbsp;2315. The modern PKCS#1 is v2.2 (also RFC&nbsp;8017), and has a modern description of the schemes in PKCS#1 v1.5, including RSASSA-PKCS1-v1_5.


  Is verifying a PKCS#1 v1.5 signature the same as verifying the PKCS#7 signedData structure?


Verifying a PKCS#7 signedData structure involves verifying a RSA PKCS#1 v1.5 signature, but also a number of important steps before that, including parsing that data structure, and checks which depend on context. signedData has features which might not be needed by in a bootloader, like certificates with revocation lists.