Unless the NSA gets into your computer and obtains the decipher, no. Modern encryption is virtually impossible to crack. Even with the best super computers it would take billions of years to crack one encryption. The NSA may be powerful, but it can't bypass mathematics.
Yes, but only when they need access expeditiously. Eventually, the government cracks the code. Example: Feds wanted access to San Bernadino shooter's iPhone. Apple refused. An Israeli company helped DHS crack it instead. Now it's believed the US government can crack every iPhone in existence.
Unless the NSA gets into your computer and obtains the decipher, no. Modern encryption is virtually impossible to crack. Even with the best super computers it would take billions of years to crack one encryption. The NSA may be powerful, but it can't bypass mathematics.
You'd be surprised. Not everyone is using the appropriate number of bits and such
Exactly. As you pointed out, why would intelligence agencies demand a backdoor if it's so easy?
Yes, but only when they need access expeditiously. Eventually, the government cracks the code. Example: Feds wanted access to San Bernadino shooter's iPhone. Apple refused. An Israeli company helped DHS crack it instead. Now it's believed the US government can crack every iPhone in existence.