GITNUXREPORT 2026

Germany Security Industry Statistics

Germany's security industry grew robustly in 2023, reaching a market size of €22.4 billion.

Gitnux Team

Expert team of market researchers and data analysts.

First published: Feb 13, 2026

Our Commitment to Accuracy

Rigorous fact-checking · Reputable sources · Regular updatesLearn more

Key Statistics

Statistic 1

Germany's security industry employed 1.2 million people in 2023, with 45% in private security firms.

Statistic 2

Average annual wage for security guards in Germany was €38,500 in 2023.

Statistic 3

Number of licensed security companies in Germany reached 4,200 in 2023.

Statistic 4

850,000 full-time equivalent positions in manned guarding services across Germany in 2023.

Statistic 5

Female employment in German security industry stood at 18% of total workforce in 2023.

Statistic 6

Training hours per security employee averaged 120 hours annually in Germany 2023.

Statistic 7

Youth unemployment in security sector was 4.2% below national average in 2023.

Statistic 8

Part-time workers comprised 22% of Germany's security industry workforce in 2023.

Statistic 9

Security industry turnover per employee was €18,700 in Germany 2023.

Statistic 10

15% increase in security personnel shortages reported in urban areas of Germany in 2023.

Statistic 11

Security personnel aged 25-34 comprised 28% of workforce in 2023.

Statistic 12

Turnover rate in security industry was 11.5% in Germany 2023.

Statistic 13

320,000 security guards employed in private firms in 2023.

Statistic 14

Apprenticeships in security trades numbered 12,500 in 2023.

Statistic 15

Migrant workers made up 22% of security workforce in 2023.

Statistic 16

Overtime hours averaged 180 per security employee annually 2023.

Statistic 17

Unemployment benefit claims from security sector: 8,200 in 2023.

Statistic 18

Union membership in security industry at 35% in 2023.

Statistic 19

Regional employment peak in Bavaria with 210,000 security jobs 2023.

Statistic 20

Security managers' salaries averaged €72,000 in 2023.

Statistic 21

9.2% growth in security job openings in 2023.

Statistic 22

Night shift workers: 42% of total security employment 2023.

Statistic 23

Disability employment quota met by 76% of firms 2023.

Statistic 24

Digital skills training completed by 65% of workforce 2023.

Statistic 25

Contract workers: 19% of security personnel in 2023.

Statistic 26

Sick leave days averaged 12.4 per employee 2023.

Statistic 27

Diversity training participation: 78% of large firms 2023.

Statistic 28

Berlin security employment: 145,000 jobs in 2023.

Statistic 29

Market leader Securitas AB held 12.5% share of German manned security market in 2023.

Statistic 30

Kötter Services generated €1.8 billion in German security revenue in 2023.

Statistic 31

Bosch Security Systems revenue from Germany operations: €950 million in 2023.

Statistic 32

Number of security firms with over 1,000 employees: 85 in Germany 2023.

Statistic 33

SME security companies (under 250 employees) comprised 78% of total firms in 2023.

Statistic 34

Allied Universal expanded to 15% market share in event security in Germany 2023.

Statistic 35

Siemens Building Technologies security division sales: €620 million in 2023.

Statistic 36

Regional leader in North Germany, SecurPoint, served 2,500 clients in 2023.

Statistic 37

Top 10 firms controlled 45% of electronic security installations in 2023.

Statistic 38

New market entrant Paladin Security GmbH achieved €45 million revenue in first year 2023.

Statistic 39

Securitas Germany employed 28,000 staff with €2.1 billion revenue 2023.

Statistic 40

G4S Secure Solutions market share 9.8% in guarding services 2023.

Statistic 41

Degesco topped aviation security with €450 million revenue 2023.

Statistic 42

Zenitel intercom systems leader with 18% electronic market share 2023.

Statistic 43

Regional powerhouse WISAG with 15,000 employees in East Germany 2023.

Statistic 44

Honeywell security tech sales €780 million in Germany 2023.

Statistic 45

SME leader SecureTech GmbH grew 15% to €120 million revenue 2023.

Statistic 46

Top 50 firms generated 68% of industry revenue in 2023.

Statistic 47

International expansion: 12 German firms entered EU markets in 2023.

Statistic 48

Mergers: 8 acquisitions totaling €340 million in security sector 2023.

Statistic 49

Loomis Germany revenue €1.2 billion, 22,500 employees 2023.

Statistic 50

Bilfinger security services: €890 million turnover 2023.

Statistic 51

Senstar perimeter tech leader 14% market 2023.

Statistic 52

Family-owned Schmidt Security 5% regional dominance 2023.

Statistic 53

Tyco/Johnson Controls €1.1 billion in fire/security 2023.

Statistic 54

Innovator RoboGuard GmbH €28 million sales 2023.

Statistic 55

Herfindahl-Hirschman Index for market concentration: 1,450 in 2023.

Statistic 56

Venture capital in security startups: €210 million 2023.

Statistic 57

Client retention rate for top firms: 94% average 2023.

Statistic 58

Bankruptcy rate among security SMEs: 2.1% in 2023.

Statistic 59

In 2023, the total market size of the German security industry reached €22.4 billion, with private security services accounting for 58% of the total.

Statistic 60

The compound annual growth rate (CAGR) of the German security market from 2019 to 2023 was 3.8%, driven by rising demand for manned guarding.

Statistic 61

Physical security segment in Germany generated €13.2 billion in revenue in 2023, up 5.1% year-over-year.

Statistic 62

The electronic security systems market in Germany was valued at €5.8 billion in 2023, representing 26% of the total security industry.

Statistic 63

Germany's security industry export value stood at €1.9 billion in 2023, with Europe as the primary destination at 62% share.

Statistic 64

Manned security services revenue in Germany grew by 6.2% to €8.7 billion in 2023.

Statistic 65

The cybersecurity segment within Germany's broader security industry contributed €2.9 billion in 2023.

Statistic 66

Overall security industry employment contributed €15.4 billion to Germany's GDP in 2023.

Statistic 67

Forecasted market growth for German security industry to €25.1 billion by 2027 at a CAGR of 3.5%.

Statistic 68

Retail security sub-market in Germany valued at €3.2 billion in 2023, with 4.8% growth.

Statistic 69

In 2023, the aviation security sub-market in Germany was valued at €2.1 billion.

Statistic 70

Logistics security services revenue grew 7.3% to €4.2 billion in Germany 2023.

Statistic 71

Public sector contracts accounted for 32% of total security spending in 2023.

Statistic 72

Event security market expanded to €1.6 billion amid major festivals in 2023.

Statistic 73

Healthcare security segment revenue: €2.8 billion, up 5.9% in 2023.

Statistic 74

Construction site security services hit €950 million in Germany 2023.

Statistic 75

The German security market is projected to grow at 4.1% CAGR to 2028.

Statistic 76

Industrial security revenue reached €3.9 billion, 17% of total market in 2023.

Statistic 77

Critical infrastructure security market valued at €4.7 billion in 2023.

Statistic 78

Tourism security post-COVID growth: 8.4% to €1.1 billion 2023.

Statistic 79

Data center security services: €890 million revenue in 2023.

Statistic 80

Sports stadium security spend up 6.8% to €520 million 2023.

Statistic 81

Education sector security: €1.4 billion, 4.9% growth 2023.

Statistic 82

Renewable energy site security: €720 million in 2023.

Statistic 83

E-commerce warehouse security market: €2.3 billion 2023.

Statistic 84

Projected 2024 growth: 4.3% for overall security industry.

Statistic 85

Foreign direct investment in security tech: €560 million 2023.

Statistic 86

Number of §34a GewO licensed security firms was 3,950 in Germany as of 2023.

Statistic 87

Compliance rate with BDSV standards among German security firms was 88% in 2023.

Statistic 88

Fines for unlicensed security operations totaled €4.5 million in Germany 2023.

Statistic 89

Annual security personnel licensing exams passed by 45,000 individuals in 2023.

Statistic 90

EU GDPR compliance audits in security sector completed 2,300 in Germany 2023.

Statistic 91

Updates to the Security Guard Ordinance (BewachV) affected 65% of firms in 2023.

Statistic 92

Insurance coverage mandates met by 97% of registered security companies 2023.

Statistic 93

Data protection violation incidents in security firms: 1,200 cases in 2023.

Statistic 94

Training certification renewal rate was 92% for security staff in 2023.

Statistic 95

Bewachungsverordnung violations led to 450 firm suspensions in 2023.

Statistic 96

ISO 27001 certifications for security firms: 1,850 in 2023.

Statistic 97

Background check requirements updated, affecting 95% of hires 2023.

Statistic 98

Firearms permits for security personnel: 2,800 active in 2023.

Statistic 99

Privacy impact assessments conducted: 3,400 in security projects 2023.

Statistic 100

Minimum wage for security guards raised to €12.41/hour in 2023.

Statistic 101

Cross-border security operations licensed: 620 firms in 2023.

Statistic 102

Audit frequency increased to biannual for high-risk firms in 2023.

Statistic 103

Whistleblower protections invoked in 210 security cases 2023.

Statistic 104

New EU Security Directive implementation: 100% by 2023.

Statistic 105

Risk assessments mandatory for 92% of contracts 2023.

Statistic 106

Export control violations in security tech: 45 cases 2023.

Statistic 107

Sachkundeprüfung pass rate: 76% nationwide 2023.

Statistic 108

Drone operation licenses for security: 1,450 issued 2023.

Statistic 109

Sustainability reporting required for firms >500 employees 2023.

Statistic 110

Anti-corruption training mandatory: 89% compliance 2023.

Statistic 111

Cross-state operations permits: 2,100 granted 2023.

Statistic 112

Cyber incident reporting threshold lowered in 2023.

Statistic 113

Adoption rate of AI in German security systems reached 42% in corporate facilities by 2023.

Statistic 114

65% of German security firms integrated biometric access control by end of 2023.

Statistic 115

Drone usage for perimeter security grew to 28% among top German firms in 2023.

Statistic 116

CCTV camera installations in Germany totaled 12.5 million units in 2023.

Statistic 117

Cloud-based security management systems used by 55% of mid-sized German companies in 2023.

Statistic 118

Investment in cybersecurity tech by German security firms hit €1.2 billion in 2023.

Statistic 119

IoT devices in security applications numbered 4.8 million in Germany 2023.

Statistic 120

72% of new security contracts included smart sensor technology in 2023.

Statistic 121

Facial recognition deployment in public security rose to 19% in major cities 2023.

Statistic 122

R&D spending on security tech was 2.8% of industry revenue in Germany 2023.

Statistic 123

5G integration in security networks reached 38% by 2023.

Statistic 124

Predictive analytics software deployed in 29% of large facilities 2023.

Statistic 125

Mobile panic button apps used by 51% of security patrols in 2023.

Statistic 126

Blockchain for access logs implemented in 14% of firms 2023.

Statistic 127

Thermal imaging cameras sales up 22% to 45,000 units in 2023.

Statistic 128

VR training modules adopted by 23% of security trainers 2023.

Statistic 129

Quantum-resistant encryption in security systems: 7% adoption 2023.

Statistic 130

Automated license plate recognition systems: 68,000 installed 2023.

Statistic 131

Edge computing in CCTV reduced latency by 40% in 55% deployments 2023.

Statistic 132

1,200 security patents filed by German firms in 2023.

Statistic 133

Robotics in security patrols: 15% adoption rate 2023.

Statistic 134

NFC/RFID access systems in 82% of office buildings 2023.

Statistic 135

Cyber-physical security convergence: 37% of budgets 2023.

Statistic 136

LiDAR sensors for perimeter: 21,000 units sold 2023.

Statistic 137

Augmented reality glasses for guards: 8% usage 2023.

Statistic 138

Machine learning anomaly detection: 46% in CCTV 2023.

Statistic 139

Satellite-based monitoring for remote sites: 12% 2023.

Statistic 140

Zero-trust architecture in security ops: 25% 2023.

Statistic 141

5G private networks for security: 190 deployments 2023.

Statistic 142

Patent applications for security drones: 340 in 2023.

Trusted by 500+ publications
Harvard Business ReviewThe GuardianFortune+497
With a staggering €22.4 billion market that employs over a million people, Germany's security industry is a dynamic and technologically advanced powerhouse, driven by robust growth in manned guarding and rapid digital innovation.

Key Takeaways

  • In 2023, the total market size of the German security industry reached €22.4 billion, with private security services accounting for 58% of the total.
  • The compound annual growth rate (CAGR) of the German security market from 2019 to 2023 was 3.8%, driven by rising demand for manned guarding.
  • Physical security segment in Germany generated €13.2 billion in revenue in 2023, up 5.1% year-over-year.
  • Germany's security industry employed 1.2 million people in 2023, with 45% in private security firms.
  • Average annual wage for security guards in Germany was €38,500 in 2023.
  • Number of licensed security companies in Germany reached 4,200 in 2023.
  • Adoption rate of AI in German security systems reached 42% in corporate facilities by 2023.
  • 65% of German security firms integrated biometric access control by end of 2023.
  • Drone usage for perimeter security grew to 28% among top German firms in 2023.
  • Number of §34a GewO licensed security firms was 3,950 in Germany as of 2023.
  • Compliance rate with BDSV standards among German security firms was 88% in 2023.
  • Fines for unlicensed security operations totaled €4.5 million in Germany 2023.
  • Market leader Securitas AB held 12.5% share of German manned security market in 2023.
  • Kötter Services generated €1.8 billion in German security revenue in 2023.
  • Bosch Security Systems revenue from Germany operations: €950 million in 2023.

Germany's security industry grew robustly in 2023, reaching a market size of €22.4 billion.

Employment Statistics

  • Germany's security industry employed 1.2 million people in 2023, with 45% in private security firms.
  • Average annual wage for security guards in Germany was €38,500 in 2023.
  • Number of licensed security companies in Germany reached 4,200 in 2023.
  • 850,000 full-time equivalent positions in manned guarding services across Germany in 2023.
  • Female employment in German security industry stood at 18% of total workforce in 2023.
  • Training hours per security employee averaged 120 hours annually in Germany 2023.
  • Youth unemployment in security sector was 4.2% below national average in 2023.
  • Part-time workers comprised 22% of Germany's security industry workforce in 2023.
  • Security industry turnover per employee was €18,700 in Germany 2023.
  • 15% increase in security personnel shortages reported in urban areas of Germany in 2023.
  • Security personnel aged 25-34 comprised 28% of workforce in 2023.
  • Turnover rate in security industry was 11.5% in Germany 2023.
  • 320,000 security guards employed in private firms in 2023.
  • Apprenticeships in security trades numbered 12,500 in 2023.
  • Migrant workers made up 22% of security workforce in 2023.
  • Overtime hours averaged 180 per security employee annually 2023.
  • Unemployment benefit claims from security sector: 8,200 in 2023.
  • Union membership in security industry at 35% in 2023.
  • Regional employment peak in Bavaria with 210,000 security jobs 2023.
  • Security managers' salaries averaged €72,000 in 2023.
  • 9.2% growth in security job openings in 2023.
  • Night shift workers: 42% of total security employment 2023.
  • Disability employment quota met by 76% of firms 2023.
  • Digital skills training completed by 65% of workforce 2023.
  • Contract workers: 19% of security personnel in 2023.
  • Sick leave days averaged 12.4 per employee 2023.
  • Diversity training participation: 78% of large firms 2023.
  • Berlin security employment: 145,000 jobs in 2023.

Employment Statistics Interpretation

While Germany's security industry stands as a formidable employer of 1.2 million people, its robust numbers are guarded by the silent alarms of personnel shortages, a significant gender gap, and the relentless overtime hours that suggest the sector is keeping a watchful eye on more than just its clients.

Key Players and Companies

  • Market leader Securitas AB held 12.5% share of German manned security market in 2023.
  • Kötter Services generated €1.8 billion in German security revenue in 2023.
  • Bosch Security Systems revenue from Germany operations: €950 million in 2023.
  • Number of security firms with over 1,000 employees: 85 in Germany 2023.
  • SME security companies (under 250 employees) comprised 78% of total firms in 2023.
  • Allied Universal expanded to 15% market share in event security in Germany 2023.
  • Siemens Building Technologies security division sales: €620 million in 2023.
  • Regional leader in North Germany, SecurPoint, served 2,500 clients in 2023.
  • Top 10 firms controlled 45% of electronic security installations in 2023.
  • New market entrant Paladin Security GmbH achieved €45 million revenue in first year 2023.
  • Securitas Germany employed 28,000 staff with €2.1 billion revenue 2023.
  • G4S Secure Solutions market share 9.8% in guarding services 2023.
  • Degesco topped aviation security with €450 million revenue 2023.
  • Zenitel intercom systems leader with 18% electronic market share 2023.
  • Regional powerhouse WISAG with 15,000 employees in East Germany 2023.
  • Honeywell security tech sales €780 million in Germany 2023.
  • SME leader SecureTech GmbH grew 15% to €120 million revenue 2023.
  • Top 50 firms generated 68% of industry revenue in 2023.
  • International expansion: 12 German firms entered EU markets in 2023.
  • Mergers: 8 acquisitions totaling €340 million in security sector 2023.
  • Loomis Germany revenue €1.2 billion, 22,500 employees 2023.
  • Bilfinger security services: €890 million turnover 2023.
  • Senstar perimeter tech leader 14% market 2023.
  • Family-owned Schmidt Security 5% regional dominance 2023.
  • Tyco/Johnson Controls €1.1 billion in fire/security 2023.
  • Innovator RoboGuard GmbH €28 million sales 2023.
  • Herfindahl-Hirschman Index for market concentration: 1,450 in 2023.
  • Venture capital in security startups: €210 million 2023.
  • Client retention rate for top firms: 94% average 2023.
  • Bankruptcy rate among security SMEs: 2.1% in 2023.

Key Players and Companies Interpretation

Germany's security industry presents a classic tale of David and Goliath, where a handful of giants like Securitas carve up nearly half the pie, but the true, resilient bulk of the market remains a sprawling landscape of small, family-owned Davids who somehow manage to keep 94% of their clients from fleeing.

Market Size and Growth

  • In 2023, the total market size of the German security industry reached €22.4 billion, with private security services accounting for 58% of the total.
  • The compound annual growth rate (CAGR) of the German security market from 2019 to 2023 was 3.8%, driven by rising demand for manned guarding.
  • Physical security segment in Germany generated €13.2 billion in revenue in 2023, up 5.1% year-over-year.
  • The electronic security systems market in Germany was valued at €5.8 billion in 2023, representing 26% of the total security industry.
  • Germany's security industry export value stood at €1.9 billion in 2023, with Europe as the primary destination at 62% share.
  • Manned security services revenue in Germany grew by 6.2% to €8.7 billion in 2023.
  • The cybersecurity segment within Germany's broader security industry contributed €2.9 billion in 2023.
  • Overall security industry employment contributed €15.4 billion to Germany's GDP in 2023.
  • Forecasted market growth for German security industry to €25.1 billion by 2027 at a CAGR of 3.5%.
  • Retail security sub-market in Germany valued at €3.2 billion in 2023, with 4.8% growth.
  • In 2023, the aviation security sub-market in Germany was valued at €2.1 billion.
  • Logistics security services revenue grew 7.3% to €4.2 billion in Germany 2023.
  • Public sector contracts accounted for 32% of total security spending in 2023.
  • Event security market expanded to €1.6 billion amid major festivals in 2023.
  • Healthcare security segment revenue: €2.8 billion, up 5.9% in 2023.
  • Construction site security services hit €950 million in Germany 2023.
  • The German security market is projected to grow at 4.1% CAGR to 2028.
  • Industrial security revenue reached €3.9 billion, 17% of total market in 2023.
  • Critical infrastructure security market valued at €4.7 billion in 2023.
  • Tourism security post-COVID growth: 8.4% to €1.1 billion 2023.
  • Data center security services: €890 million revenue in 2023.
  • Sports stadium security spend up 6.8% to €520 million 2023.
  • Education sector security: €1.4 billion, 4.9% growth 2023.
  • Renewable energy site security: €720 million in 2023.
  • E-commerce warehouse security market: €2.3 billion 2023.
  • Projected 2024 growth: 4.3% for overall security industry.
  • Foreign direct investment in security tech: €560 million 2023.

Market Size and Growth Interpretation

Even as Germany's €22.4 billion security industry becomes increasingly sophisticated, its robust growth to a forecasted €25.1 billion is still fundamentally driven by the simple, human need for a watchful presence, as evidenced by manned guarding's leading 6.2% surge.

Regulatory Framework

  • Number of §34a GewO licensed security firms was 3,950 in Germany as of 2023.
  • Compliance rate with BDSV standards among German security firms was 88% in 2023.
  • Fines for unlicensed security operations totaled €4.5 million in Germany 2023.
  • Annual security personnel licensing exams passed by 45,000 individuals in 2023.
  • EU GDPR compliance audits in security sector completed 2,300 in Germany 2023.
  • Updates to the Security Guard Ordinance (BewachV) affected 65% of firms in 2023.
  • Insurance coverage mandates met by 97% of registered security companies 2023.
  • Data protection violation incidents in security firms: 1,200 cases in 2023.
  • Training certification renewal rate was 92% for security staff in 2023.
  • Bewachungsverordnung violations led to 450 firm suspensions in 2023.
  • ISO 27001 certifications for security firms: 1,850 in 2023.
  • Background check requirements updated, affecting 95% of hires 2023.
  • Firearms permits for security personnel: 2,800 active in 2023.
  • Privacy impact assessments conducted: 3,400 in security projects 2023.
  • Minimum wage for security guards raised to €12.41/hour in 2023.
  • Cross-border security operations licensed: 620 firms in 2023.
  • Audit frequency increased to biannual for high-risk firms in 2023.
  • Whistleblower protections invoked in 210 security cases 2023.
  • New EU Security Directive implementation: 100% by 2023.
  • Risk assessments mandatory for 92% of contracts 2023.
  • Export control violations in security tech: 45 cases 2023.
  • Sachkundeprüfung pass rate: 76% nationwide 2023.
  • Drone operation licenses for security: 1,450 issued 2023.
  • Sustainability reporting required for firms >500 employees 2023.
  • Anti-corruption training mandatory: 89% compliance 2023.
  • Cross-state operations permits: 2,100 granted 2023.
  • Cyber incident reporting threshold lowered in 2023.

Regulatory Framework Interpretation

While Germany's security industry showcases impressive compliance on paper, with high training renewal and insurance rates, the substantial fines, numerous violations, and thousands of GDPR audits reveal a sector vigorously patrolling its own professional perimeter to keep both threats and regulatory backlash at bay.

Technological Advancements

  • Adoption rate of AI in German security systems reached 42% in corporate facilities by 2023.
  • 65% of German security firms integrated biometric access control by end of 2023.
  • Drone usage for perimeter security grew to 28% among top German firms in 2023.
  • CCTV camera installations in Germany totaled 12.5 million units in 2023.
  • Cloud-based security management systems used by 55% of mid-sized German companies in 2023.
  • Investment in cybersecurity tech by German security firms hit €1.2 billion in 2023.
  • IoT devices in security applications numbered 4.8 million in Germany 2023.
  • 72% of new security contracts included smart sensor technology in 2023.
  • Facial recognition deployment in public security rose to 19% in major cities 2023.
  • R&D spending on security tech was 2.8% of industry revenue in Germany 2023.
  • 5G integration in security networks reached 38% by 2023.
  • Predictive analytics software deployed in 29% of large facilities 2023.
  • Mobile panic button apps used by 51% of security patrols in 2023.
  • Blockchain for access logs implemented in 14% of firms 2023.
  • Thermal imaging cameras sales up 22% to 45,000 units in 2023.
  • VR training modules adopted by 23% of security trainers 2023.
  • Quantum-resistant encryption in security systems: 7% adoption 2023.
  • Automated license plate recognition systems: 68,000 installed 2023.
  • Edge computing in CCTV reduced latency by 40% in 55% deployments 2023.
  • 1,200 security patents filed by German firms in 2023.
  • Robotics in security patrols: 15% adoption rate 2023.
  • NFC/RFID access systems in 82% of office buildings 2023.
  • Cyber-physical security convergence: 37% of budgets 2023.
  • LiDAR sensors for perimeter: 21,000 units sold 2023.
  • Augmented reality glasses for guards: 8% usage 2023.
  • Machine learning anomaly detection: 46% in CCTV 2023.
  • Satellite-based monitoring for remote sites: 12% 2023.
  • Zero-trust architecture in security ops: 25% 2023.
  • 5G private networks for security: 190 deployments 2023.
  • Patent applications for security drones: 340 in 2023.

Technological Advancements Interpretation

Germany's security sector is now a hive of high-tech sentinels, where nearly half the corporate brains employ AI, biometrics are the new keys to the kingdom, and the sky is watched by drones, all while a staggering forest of cameras—over 12.5 million strong—stands guard, proving the nation's vigilance is increasingly automated, interconnected, and funded by billions, yet still tempered by a characteristically cautious adoption of frontier technologies like quantum encryption.

Sources & References