The best replacement for encryption is hashing.

The best alternatives to encryption are rated as following:
★★★★★  hashing
★★★  authentication
★★★  compression
★★  cryptography
★★  password
★★  decryption
★★  encoding
★★  asymmetric encryption
★  password protection
★  tokenization
★  symmetric encryption
★  software encryption
★  wpa
★  private key encryption
★  hash
★  signing
★  obfuscation
★  encapsulation
★  masking
★  tkip
★  cipher
★  end to end encryption
  steganography
  hardware encryption
  aes encryption
  password protect
  128
  hashing passwords
  256 bit encryption
  end to end
  compression first
  digital signature
  bitlocker
  end-to-end
  wep

Your alternative for encryption is not listed? Suggest!
Speaking about encryption, one probably shouldn't forget about ssl.

Other search terms related to encryption and their ratings are:
★★★★★ ssl
★★★★★ winzip
★★★★★ authentication
★★★ compression
★ key exchange
★ ftp
https
vpn
You have in mind a companion for encryption and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of encryption in all years. Click on graph for more.
encryption
hashing
authentication