As the hash is a one-way algorithm, you cannot decode the hash back into the password. However, you can hash the password that the user has entered, and compare this hash with the stored hash of the password. If the two hashes match, then the correct password was entered.

Unfortunately, Hashbytes() only gives you two choices – a 16 character hash (128 bit), or a 20 character hash (160 bit). You may be able to find a different hashing algorithm on the Internet that only uses 10 bytes, or you can use a 128 bit algorithm and simply ignore the extra 6 bytes. Regardless of whether you use a different algorithm or trim a longer one down, you are more likely to encounter a hash collision, simply due to the fewer number of combinations that can be made. In practice, however, you may never encounter a collision, but you should have some way of resolving collisions.

For Ex;
Always keep the hashvalue with 10 characters