Initial Definitions

Plain Text - the message or data you'd like to encrypt

Cipher - the key used to encrypt the plain text

Cipher Text - the resultant, encrypted, message or information

Perfect Secrecy

No information about the plain text is made available from the cipher text

No information about the cipher is made available from the cipher text

What That Means

In an encryption implementation exhibiting perfect secrecy, there is no information about the plain text that is given away

From the cipher text alone, you cannot determine the plain text message

Perfect secrecy is immune to Quantum Hacking

Caution

Given enough time, a brute force operation can still crack the cipher text based on knowing something about the cipher (including length)

Thus, the length of and the cipher itself must be randomized (in any scenario in which something about the cipher is known, perfect secrecy doesn't exist)

Simple Recommendations

Create randomized ciphers both in terms of length and characters

Create long ciphers (20+ characters)

Enforce two factor authentication where user credentials are required