The PIN does not have to be very long in order to be strong because unlike some other encryption solutions, the PIN is not an integral part of the key derivation algorithm, and brute force attempts are addressed by slowing down multiple unsuccessful attempts. You can optionally choose to have BitLocker require a PIN in addition to the TPM in order to unlock the OS partition, in which case that prompt will appear at boot. If the platform integrity check fails, you will be prompted for the Recovery Key, so absolutely make sure you back that up. BitLocker instead stores a decryption key in your system's TPM, and the TPM only releases it if it completes a "platform integrity check" to verify that nothing about the hardware environment has changed that might cause the password to be compromised if the TPM released the key. In terms of when the password prompts appear, if you are using BitLocker on your Windows partition, then by default there's no password at all.
HASLEO BITLOCKER ANYWHERE FOR WINDOWS WINDOWS 10
The Home editions do not allow you to enable BitLocker on a partition that is not already using it (except that certain Windows 10 Home systems do allow reduced BitLocker functionality, but that's not very common.)
HASLEO BITLOCKER ANYWHERE FOR WINDOWS PRO
On Windows 8 and newer, you need Pro or better. On Windows Vista and 7, you need Enterprise or better. However, although any version of Windows since Vista can access BitLocker volumes, only certain editions can create BitLocker volumes. Windintroduced a new encryption scheme that only works on Windand newer, but you can still choose to use the original encryption scheme when setting up BitLocker on a partition if you want. But if you're asking how BitLocker works, any version of Windows Vista and up can unlock BitLocker partitions. I'm not sure what you're asking when you want people to post their "bitlocker supply-password".
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