how to get original string value from encrypted string?

Question

I am encrypting password using DigestUtils.sha256Hex("password").I get encrypted password as 5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8

I want original password string from encrypted . How shall i get it? Please help me. Thanks

score 3 · Accepted Answer · answered Oct 08 '14 at 09:03

3

The whole point of Sha256 hashing is that you cannot decrypt it. When doing a login check, you should hash the user entered password and match it with the one you've stored in your datalayer.

answered Oct 08 '14 at 09:03

Scherling

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+1. You should also only store a *salted* hash (something like `sha256Hex(salt+password)`. Otherwise any two users with the same password *in any system* get the the same hash and it becomes somewhat reversible using rainbow tables. For example, you can google 5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8. – Thilo Oct 08 '14 at 09:07

score 1 · Answer 2 · answered Oct 08 '14 at 09:03

1

DigestUtils.sha256Hex is not encription it is hash. Main property of hash it is irreversible

answered Oct 08 '14 at 09:03

talex

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how to get original string value from encrypted string?

2 Answers2