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About gcm-c
gcmc is software that performs authentication encryption.
GCM mode of AES (AES-256-GCM) is used as a method.
If decryption of block ciphers has not been done by any means,
The encryption key (password) is incorrect.
The cipher text is broken (falsified).
In that case, it will not return to the original plain text.
Decryption in this case is something like "double encryption".
Then, that cipher text will be output as the decrypted text.
However, if you use a cipher with authentication function, you can see "Is it back to plaintext as it was before encryption?"
Then, when it detects that "the plaintext as it is before encryption is not returned to plaintext", the decryption work is stopped and nothing is output.
If you use cipher with authentication function, you can almost certainly restore "just plaintext before encryption" without any problem.
You can not afford to use strange decrypting results.
If the cipher text is tampered with, it must be detected.
It is possible to realize something like this.
Also, gcmc can use following three types of encryption keys:
password key
key file
binary key
GCM mode of AES (AES-256-GCM) is used as a method.
If decryption of block ciphers has not been done by any means,
The encryption key (password) is incorrect.
The cipher text is broken (falsified).
In that case, it will not return to the original plain text.
Decryption in this case is something like "double encryption".
Then, that cipher text will be output as the decrypted text.
However, if you use a cipher with authentication function, you can see "Is it back to plaintext as it was before encryption?"
Then, when it detects that "the plaintext as it is before encryption is not returned to plaintext", the decryption work is stopped and nothing is output.
If you use cipher with authentication function, you can almost certainly restore "just plaintext before encryption" without any problem.
You can not afford to use strange decrypting results.
If the cipher text is tampered with, it must be detected.
It is possible to realize something like this.
Also, gcmc can use following three types of encryption keys:
password key
key file
binary key
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What's New in the Latest Version 1.1
Last updated on May 21, 2019
Old Versions
Supported iPhone X, XR, XS, etc.
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Version History
1.1
May 21, 2019
Supported iPhone X, XR, XS, etc.
1.0
Feb 26, 2018
gcm-c Price
Today:
$1.99
Lowest:
$0.99
Highest:
$1.99
gcm-c FAQ
Click here to learn how to download gcm-c in restricted country or region.
Check the following list to see the minimum requirements of gcm-c.
iPhone
gcm-c supports English
