Assuming we have 2 files:

FILE 1 Uncompressed size: 793765 bytes Compressed size: 604911 bytes Data type: 99% Base64 Compression method : deflate dynamic

FILE 2 Uncompressed size: 793765 bytes Compressed size: 604911 bytes Data type: 99% Base64 Compression method : deflate dynamic

The 2 files share 20 initial bytes in uncompressed data. What are the chances that the compressed data after the zip headers share 3 initial bytes.

I have came across 5 files with the above characteristics and 4 of then had:

14 9A C7

and the other:

1C 9A C7

And i am confused of this.

If the above case is true then given the characteristics above one can easily guess the first bytes of the compressed file up 5 initial bytes.

Assuming we have 2 files:

FILE 1

• Uncompressed size: 793765 bytes
• Compressed size: 604911 bytes
• Data type: 99% Base64
• Compression method : deflate dynamic

FILE 2

• Uncompressed size: 793765 bytes
• Compressed size: 604911 bytes
• Data type: 99% Base64
• Compression method : deflate dynamic

The 2 files share 20 initial bytes in uncompressed data. What are the chances that the compressed data after the zip headers share 3 initial bytes.

I have came across 5 files with the above characteristics and 4 of them had:

14 9A C7

and the other:

1C 9A C7

And i am confused of this.

If the above case is true then given the characteristics above one can easily guess the first bytes of the compressed file up 5 initial bytes.