Is it possible to safely encrypt an already encrypted file?

Question

Encryption

CLARIFICATION. If I take a copy of a file from a password manager that is encrypted with one standard, and then add it to a container like VeraCrypt that encrypts with a different one, will subsequent decryption fail due to different methods?

Answer 1

when you encrypt a file, the output is a file. and the file can be encrypted.

Answer 2

Well, failures are always possible. Due to memory or media glitches, for example, due to errors in the encryption algorithm that appear on a certain data set.
An encrypted file for another container is no different from any other file. Only to obtain data, you are tormented to disassemble this cabbage from encryptions.

Answer 3

Can.

Answer 4

Of course you will have a failure, that's why it is cryptography. You cannot decrypt the text of one algorithm with another algorithm.
Your actions should be the following when encrypting:
- plaintext
- algorithm (1)
....
-algorithm(n)
- ciphertext.
Decryption:
-ciphertext -algorithm
(n)
....
-algorithm(1)
-plaintext
Only in such sequences does it work. You must not confuse the sequences of the algorithm, otherwise you will never get the source text.
Ps Why do you need to encrypt text 2 or more times? Consider what happens if the sequence is broken by your programs.

Answer 5

Can. At least ten times to encrypt. Only it will be inconvenient then to enter ten passwords.
JFYI: Google the phrase "forty thousand monkeys put a banana in .opu"