Encryption produces different output

Code reviewSecuritySenior–Staff~30 min

Review this Java field-encryption helper for PII.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 30 min

Mark a line and say what kind of problem it is.0 findings

1public byte[] encrypt(byte[] plaintext, SecretKey key) throws Exception {

2 Cipher c = Cipher.getInstance("AES"); // provider default

3 c.init(Cipher.ENCRYPT_MODE, key);

4 return c.doFinal(plaintext);

7public byte[] decrypt(byte[] ct, SecretKey key) throws Exception {

8 Cipher c = Cipher.getInstance("AES");

9 c.init(Cipher.DECRYPT_MODE, key);

10 return c.doFinal(ct);

11}

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.