There's been lots of talk about the allegedly improved encryption in Android 5. Some questions about this:
- What is the maximum length for passphrases? (i.e. is it still limited to 16 characters?)
- Can you have separate passphrases (or PINs) for encryption and unlocking?
- Considering that only the /data partition will actually be encrypted (and closed-source vendor-specific /sdcard encryption has probably had little if any peer review) - what are some good phones that have only "internal" (i.e. no /sdard) memory? Any suggestions?
And one extra question: Is the key still created by /dev/urandom (see: Android Device Encryption)? (Isn't /dev/random the more secure PRNG?)